HOW MANY OF YOU GUYS ARE BOOSTING ON STOCK BLOCKS - Ford Mustang Forums : Corral.net Mustang Forum
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post #1 of 48 Old 07-23-2010, 06:18 PM Thread Starter
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HOW MANY OF YOU GUYS ARE BOOSTING ON STOCK BLOCKS

I recently got a 92 lx with some goodies and a bottle. Ran 12.6 on the motor and 11s with the spray. Thinking about dropping the ball on a turbo but running a stock block. Its a 306 but I don't know what its in the bottom? Gonna pull the motor this winter and add a main girdle and windage tray if I decide to go turbo. How many of you guys are runnin stock blocks and boost? How many of you have blown em up??

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post #2 of 48 Old 07-23-2010, 06:42 PM
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think you should stick to 11s with spray.. not bad for a stock bottom end.. if u want to make real power and not worry get a R or dart block


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post #3 of 48 Old 07-23-2010, 06:53 PM
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My stock long block held up fine with 8 lbs of a lot of abuse, daily driving and drag strip. Sold the car so dont know if ever blew up.
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post #4 of 48 Old 07-23-2010, 06:59 PM
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lol

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post #5 of 48 Old 07-23-2010, 08:50 PM
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Do you have a power or et goal? You should get a lot of answers from a search. I sent a lot of power via boost through my old stock block, then it got sprayed pretty hard for awhile. Never died.

Scotty we need more power!!!
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post #6 of 48 Old 07-23-2010, 09:11 PM Thread Starter
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I would love to be down in the 9s but I doubt the block would handle it for long. mid to low 10s in a streetable car is my realistic goal at this point. I know DSS claims with their girdle that the block can handle 650 but how long will it last??? I think I'll be in the bottom 11s or high 10s with the way the car is now. Last time at the track 2 weeks ago I lost the clutch cable (stock) on the last pass with the spray and still ran 11.7. The week before couldn't hook up and ran 13.3 on motor and 11.6 on spray. I've always been drawn to the turbo stangs tho. Something about seeing a turbo on a 5 liter gets my blood boiling.
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post #7 of 48 Old 07-23-2010, 09:13 PM Thread Starter
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lol
???
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post #8 of 48 Old 07-24-2010, 12:03 AM
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Sofar I've made 3 full passes on 6lbsof boost with a c4 and 410gears went an 11.50 @118 letting off at 1000foot due to bouncing off rev limiter.. And u can tell the mph is very low for a turbo car... Car should go some 10.2s with my 327s 2step and transbrake
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post #9 of 48 Old 07-27-2010, 11:37 PM
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I run stock block 12psi through a tp38 on e85. Was fast at 1st after a few months it became slow. Now I added some eddys...so we shall see how long it holds.


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post #10 of 48 Old 07-28-2010, 12:38 PM
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stock block but only making 420 hp/500 ft-lb. No issues.
Moovs did the best stock block "study" He was making like high 600s for a number of years before it finally let go.
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post #11 of 48 Old 07-28-2010, 03:09 PM
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Here's my current setup:
Stock Block bored to 306, hypertunic pistons
E-cam
E-7's with Home port
Explorer Intake
Homemade TT setup
ect...

It's probably driven 1000+ hard street miles, and 20+ passes at the track. When I first built it I said I would never take it above 10psi... then about two days later it saw 20psi, and I don't think it's been below 14psi since.

I'm sure i'm on borrowed time, and one of my turbos is starting to get alot of shaft end-play... but so far, so good.

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post #12 of 48 Old 07-28-2010, 07:12 PM
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keep the revs down and it will last longer(5500 and under)
it's still a time bomb though. good luck!

89'LX 306,T.W.heads,perf.intake,36's,stock cam/1.7's,70mmT.B.,T-56,3.27's,Twin 60/63 T3's intercooled,14psi,Evolution WG's, Meth inj.
579.2rwhp 658.6rwtq,[email protected] kicked off track
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post #13 of 48 Old 07-28-2010, 07:45 PM
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keep the revs down and it will last longer(5500 and under)
it's still a time bomb though. good luck!
I forgot to say I consistently put it on off the rev limiter... I usually shift at 6300 at the track.... The motor has maybe 10k on it since rebuild... so I'm sure that's helping.

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post #14 of 48 Old 07-28-2010, 07:58 PM
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Stock block, stock internals (30 over pistons 306) 15lbs boost 525rwhp/626rwtq [email protected]

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306 E303, TEA 185 TW, Quicktime Turbo 67mm, Redneck C4 15lbs boost
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post #15 of 48 Old 07-28-2010, 08:03 PM
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going 408 twin turbo in stock 351 roller real soon!
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post #16 of 48 Old 07-29-2010, 01:32 PM
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Hell a guy on the turbo forums runs 5s...YES 5s in the 1/8 with a STOCK bottom end. That should equal to mid 7s to low 8s.

http://www.theturboforums.com/smf/in...topic=134457.0


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post #17 of 48 Old 07-29-2010, 03:29 PM
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my junk motor is a explorer motor with a B cam and a c4 it is making 469 to the tires and 13psi..
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post #18 of 48 Old 07-29-2010, 07:12 PM
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Originally Posted by goatnipples2002 View Post
Hell a guy on the turbo forums runs 5s...YES 5s in the 1/8 with a STOCK bottom end. That should equal to mid 7s to low 8s.

http://www.theturboforums.com/smf/in...topic=134457.0
That is awesome. I'd like to know what R's he's turning. The whole hp vs rpm debate is what's intrigued me most about the stock block limits.

His 1/4 time would around 9.30's...if it'd make it another 1/8 lol.

Scotty we need more power!!!
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post #19 of 48 Old 07-29-2010, 10:31 PM
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The general rule of thumb for 1/8 to 1/4 comparison is multiply your 1/8 time by 1.5 and that should be +/- .2 of your actual time.


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post #20 of 48 Old 07-29-2010, 10:45 PM
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1.54 for a lighter car and 1.56 for a heaver car fwiw

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post #21 of 48 Old 07-29-2010, 11:29 PM
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stock block here, 12.10 at 120mph, untunned, stock h/c/i 12psi...

Turbomustang

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post #22 of 48 Old 07-30-2010, 04:04 PM
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stock 351 here
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post #23 of 48 Old 07-30-2010, 05:40 PM
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<--stock block...times in sig.

'91LX Vert- Stock Shortblock, Stock Cam, Cobra Intake, Edelbrock Performer 1.9's, 42#er's, PMAS 3", AOD, 3.27 gears, B&G 70mm Single, 3500lbs w/ me
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post #24 of 48 Old 08-01-2010, 09:53 PM Thread Starter
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Sweet. Sounds like a lot of you guys are boosting on stock blocks. Gives me a little confidence but thinkin about dropping the ball on a decent block. Lookin at an A4 for sale on here. It is amazing what thesestock blocks can handle tho for having 2 bolt mains!!

92 Chameleon Hatch.
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post #25 of 48 Old 08-01-2010, 09:57 PM Thread Starter
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If I stick with a 302 based block, what size turbo or combo should I look at to put me in the high 9s?? 331 347 67mm 70mm 88mm?? I'm a newbie with 9 second dreams, Hitting that 11 mark has started a fire!!! What should I do??

92 Chameleon Hatch.
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post #26 of 48 Old 08-01-2010, 10:53 PM
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If you want to run high 9's on a stock roller block, you may want to lighten the car up to make it easier on the motor. Keep the R's low. I'd say throw a 70mm on the motor you have and see what you can get out of it.

Scotty we need more power!!!
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post #27 of 48 Old 08-02-2010, 11:51 AM
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+1 on keeping the R's low. I think getting those pistons moving fast pushin and pullin on the crank makes the cap walk and crack the block. Thats my theory. RPM is harder on #### than cylinder pressure.
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post #28 of 48 Old 08-02-2010, 01:49 PM
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I currently have a stock 5.0 block but with forged internals running 14lbs of boost. I am still in my tuning stages but so far everything is held up. I am running a full AEM EMS setup and coil packs. The rev limited is set at 6000 to spare the block.
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post #29 of 48 Old 08-09-2010, 01:08 PM
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That is awesome. I'd like to know what R's he's turning. The whole hp vs rpm debate is what's intrigued me most about the stock block limits.

His 1/4 time would around 9.30's...if it'd make it another 1/8 lol.

Thanks! Been down the 1/4 a couple of times: it went 9.4's at 142mph with a 6.07 1/8th mile time. We gotta drive a little ways around here to get to a 1/4 mile track.

I have the light set on 5800 but the logs show it is usually around 6100. next month will be 2 years on the motor. I am upgrading the turbo to a 76 along with a built converter and see what it will do.

It's all about the tune along with a lot of luck. I would never try to push a stock block this hard on a factory computer. Been there and split a block already.

'92 Coupe - stock block 306, T72, C4 5.95 @ 116, 1.29 60ft 275/60 drag radial
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post #30 of 48 Old 08-09-2010, 05:39 PM
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Thanks! Been down the 1/4 a couple of times: it went 9.4's at 142mph with a 6.07 1/8th mile time. We gotta drive a little ways around here to get to a 1/4 mile track.

I have the light set on 5800 but the logs show it is usually around 6100. next month will be 2 years on the motor. I am upgrading the turbo to a 76 along with a built converter and see what it will do.

It's all about the tune along with a lot of luck. I would never try to push a stock block this hard on a factory computer. Been there and split a block already.
Keep us updated, that's an awesome car. Ever come to Jackson Dragway in Jackson, TN? Couple of bad turbo cars here, and then some being built ever so slowly lol.

Scotty we need more power!!!
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post #31 of 48 Old 08-10-2010, 04:57 PM
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can someone drop here an ignition-injection-fuel-pressure map, so we can get a clue about the differences between standard computer map, and a good recomended map?
i know i cant jus "copy-paste" a map, but it can give a clue...
thanks
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post #32 of 48 Old 08-10-2010, 06:29 PM
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I would never try to push a stock block this hard on a factory computer.
That is the REAL reason for so many high hp stock 302 rollers. I hate learning custom EFI, but once u do u will love the options.


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post #33 of 48 Old 08-11-2010, 11:24 PM
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How much difference are you guys seeing by ditching the stock ECU with a stock block?
Just curious whats wrong the the stock ECU?

Stock block, GT40 heads, Explorer intake, 67mm, 10lbs, 431HP 497TQ on 110 octane. 12.01 @ 123
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post #34 of 48 Old 08-12-2010, 01:41 AM
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Thanks! Been down the 1/4 a couple of times: it went 9.4's at 142mph with a 6.07 1/8th mile time. We gotta drive a little ways around here to get to a 1/4 mile track.

I have the light set on 5800 but the logs show it is usually around 6100. next month will be 2 years on the motor. I am upgrading the turbo to a 76 along with a built converter and see what it will do.

It's all about the tune along with a lot of luck. I would never try to push a stock block this hard on a factory computer. Been there and split a block already.
How much timing? How much pump gas action has it ever seen?
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post #35 of 48 Old 08-12-2010, 09:35 AM
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How much timing? How much pump gas action has it ever seen?
23* on 21#'s. Only use C16 when going to the track on kill mode. Cruising around I just put 93 pump in it and keep the boost around 13#'s. Have several different tunes for the occasion

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