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post #1 of 23 Old 08-30-2012, 08:51 PM Thread Starter
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Built 2V, pump gas limit?

My car is ready for the dyno once my new maf shows up (thanks VMP, top notch service)

Running 9.6ish comp, ported PI heads, HP 292 cams (left over from my blower) on3 T70, 60lb injectors hpx maf and dual gt super pumps.

What do ya'll reckon my pump gas limit will be? My tuner said 550 but I made almost 500 on a P1sc on pumpgas so I think a nice T70 should have no trouble making 600??

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post #2 of 23 Old 08-30-2012, 09:52 PM
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I'm running higher compression and 93 Octane and making 645whp/652wtq with no signs of detonation and could easily add some more boost. 550whp is FAR from the max on pump gas!

TIP: If those cams were designed specifically for a BLOWER (NOT Turbo) ... ditch them! See my other thread from a few days ago!


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post #3 of 23 Old 08-31-2012, 09:21 AM
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With that compression and iat's in the 110-120 degree range tops you can safely make 700-750rwhp on 93 pump gas with a turbo setup.

+1 ditch the blower cams.

07 Grabber Orange GT Prem/Vert/6060/3.55
S&H Twin turbo kit, 6262 oil-less Comp turbos
9:1 compression 281, turbo cams, e85
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Last edited by lightblade; 08-31-2012 at 09:26 AM.
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post #4 of 23 Old 08-31-2012, 10:47 AM
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I have those cams and am going back to stock cams FYI...
the power is like a centri blower but I also have ported heads and a eddy victor manifold.


Maybe you will have better luck with the stock intake?
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post #5 of 23 Old 08-31-2012, 11:13 AM
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far from the pump gas limit with that combo

03 Mustang GT
Turbo 2v
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post #6 of 23 Old 08-31-2012, 06:39 PM Thread Starter
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Awesome, I wanna stretch this T70 to it's max.

I do have the stock PI intake, personally I see nothing wrong with this intake. It survived 15+ psi on my procharger daily.


I am leaning towards a set of MHS turbo cams or MMR turbo cams, or maybe just stock ones again.
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post #7 of 23 Old 08-31-2012, 06:54 PM
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Quote:
Originally Posted by lightblade View Post
With that compression and iat's in the 110-120 degree range tops you can safely make 700-750rwhp on 93 pump gas with a turbo setup.
I'd really like to see this happen?

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post #8 of 23 Old 08-31-2012, 09:39 PM
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Originally Posted by y2k02 View Post
I'd really like to see this happen?
My IATs were 125 degrees and I'm positive I could make it there on 93. You can get pretty far on 93. I know there is a guy on ModdedMustangs making 715whp on pump gas and YSi.

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post #9 of 23 Old 08-31-2012, 10:03 PM
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Have you logged your iats while making a 1/4 pass?
You have a link to a 2v making 700+rwhp on pump gas only and not E85.

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post #10 of 23 Old 08-31-2012, 11:13 PM
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Quote:
Originally Posted by JKolbfleisch View Post
My IATs were 125 degrees and I'm positive I could make it there on 93. You can get pretty far on 93. I know there is a guy on ModdedMustangs making 715whp on pump gas and YSi.
I think hes talking bout corys old car


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post #11 of 23 Old 09-01-2012, 09:14 AM
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Quote:
Originally Posted by y2k02 View Post
Have you logged your iats while making a 1/4 pass?
You have a link to a 2v making 700+rwhp on pump gas only and not E85.
y2k02, I know you already saw this on ModdedMustangs but figured I'd post here too. This isn't the one I was thinking of ... but still impressive!
759rwhp/716rwtq Twin Tuurbo 99 GT on Pump Gas

Also, my IATs are always LOWER on the dragstrip than they are on the dyno. I don't have a log of the turbo setup right now but I'll log one this weekend.

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2007 Jeep Grand Cherokee HEMI, 2006 Infiniti G35, 2012 Honda CRV EXL [The Daily Drivers!]

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post #12 of 23 Old 09-01-2012, 01:36 PM
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Quote:
Originally Posted by y2k02 View Post
I'd really like to see this happen?

At 16psi on the 67 billet turbo I had my iat's were 90 degrees with an 11.9-12.1:1 af and I made 660rwhp.


I'm going for 750-800rwhp on 93 pump, custom turbo setup 4.5" core intercooler, 9.1:1 compression, 2618 alloy diamond pistons. Comp billet wheel tripple ceramic ball bearing oil-less 70mm turbo.

I think 20-22psi should get me there iat's around 115-120 tops is my goal and richen the tune a little to around 11.6-11.8:1. The biggest factor in pushing 93 on a turbo setup is keeping the iat's cool and the tune a little rich.

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post #13 of 23 Old 09-01-2012, 04:31 PM
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I was at the dyno waiting to put my car on it while the car in link below was tuned with 93 at 18psi.
New Numbers for my Hellion Cobra - SVTPerformance

Then when he used that same tune and 18psi he lost his engine about 4 weeks later.
I think the motor blew tonight. - Page 2 - SVTPerformance

If you guys only want "dyno" number then go ahead and use 93.
You plan to use the same tune as the dyno pull at the track you might want to run higher octane fuel.

I have lost forged engines running 93.

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post #14 of 23 Old 09-01-2012, 04:54 PM
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Quote:
Originally Posted by y2k02 View Post
I was at the dyno waiting to put my car on it while the car in link below was tuned with 93 at 18psi.
New Numbers for my Hellion Cobra - SVTPerformance

Then when he used that same tune and 18psi he lost his engine about 4 weeks later.
I think the motor blew tonight. - Page 2 - SVTPerformance

If you guys only want "dyno" number then go ahead and use 93.
You plan to use the same tune as the dyno pull at the track you might want to run higher octane fuel.

I have lost forged engines running 93.
I always throw in 2 extra gallons of 108 before running. My current tune is backed off 2 degrees from what it was doing on the dyno with zero detonation. Nobody is telling this guy to go make 750whp .... but he can certainly make more than 550whp.

1965 AC Cobra 427SC Replica [Carb Edelbrock 306ci SBF, 1980lbs]
2001 Mustang GT - [645WHP, 652TQ][MMR900 + Trick Flow Heads + Intake][ON3 Turbo @ 14psi]
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post #15 of 23 Old 09-01-2012, 05:32 PM
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I only run 12psi on the street for daily driving. This is a track tune, final tuning done on the street with real load not on a dyno. Im not in the least bit worried about 93. When the setup is done properly it's easy to do safely, way to many street cars out there nowadays running 700-800rwhp on pump gas anyway.

Were talking about pump gas limits here and from my expereince I would say 20psi and 800hp but there are lots of factors getting you there. And if parts of the equations are overlooked sure you can have problems.

The new 5.0's are making 750rwhp at 10psi on 11:1 compression, pump gas.

I remember awhile back when people thought anything over 9:1 compression and 500rwhp and you had to use race fuel etc and going over that was unheard of. Things change.

07 Grabber Orange GT Prem/Vert/6060/3.55
S&H Twin turbo kit, 6262 oil-less Comp turbos
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post #16 of 23 Old 09-01-2012, 06:38 PM Thread Starter
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Quote:
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I only run 12psi on the street for daily driving. This is a track tune, final tuning done on the street with real load not on a dyno. Im not in the least bit worried about 93. When the setup is done properly it's easy to do safely, way to many street cars out there nowadays running 700-800rwhp on pump gas anyway.

Were talking about pump gas limits here and from my expereince I would say 20psi and 800hp but there are lots of factors getting you there. And if parts of the equations are overlooked sure you can have problems.

The new 5.0's are making 750rwhp at 10psi on 11:1 compression, pump gas.

I remember awhile back when people thought anything over 9:1 compression and 500rwhp and you had to use race fuel etc and going over that was unheard of. Things change.



True story. I remember building low comp motors was considered a must for boost, now people are upping the comp.
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post #17 of 23 Old 09-01-2012, 07:33 PM
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lightblade, You fail in remembering that the op has a 2v heads. My comments are directed to the 2V setups.
You wont find guys with 2V heads making 700+rwhp running at the track putting up numbers that a 700+rwhp should make that would make said pass using only 93 pump gas.


Good read on the new 5.0 failures.
2011 & Up Coyote 5.0 Piston / Cylinder Failure

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post #18 of 23 Old 09-01-2012, 07:43 PM
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I have lost forged engines running 93.

Sounds like you ran too much boost or timing and it was a tune problem. I run E85 in all of my cars but never once had a engine fail due to octane since I tune for that fuel type to not over extend my engine.

You saying 93 destroyed your motor is like saying guns kill people...

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post #19 of 23 Old 09-01-2012, 08:32 PM
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I did not state 93 destroyed anything.

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post #20 of 23 Old 09-01-2012, 10:22 PM
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2v, 3v, 4v heads doesnt matter. I see setups running 650-700rwhp+ on pump for the 2v's as well. No way i would do pump with 12:1 compression of course. e85 is nice alternative for a turbo setup for sure.

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post #21 of 23 Old 09-01-2012, 11:30 PM
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Well, OP ... I drive my car like 200 miles per week with MANY MANY full-boost pulls each day. 93 Octane and zero problems and you can see the numbers I'm making.

Yes, E85 makes a great high-octane race fuel. It's an extra safety buffer as well. But you can take 93 quite a ways. P.S. 1/4 mile times have a TON to do with suspension, traction, transmission etc. Generally trap speed is a better indicator of actual power made.

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post #22 of 23 Old 09-02-2012, 07:36 PM Thread Starter
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^ very cool.

I'm not looking to break the 2v record I just wanna know I didn't waste 3G going from a 500hp blower just to make 550 on a turbo.


Thanks fellas
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post #23 of 23 Old 09-03-2012, 08:24 PM
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^ very cool.

I'm not looking to break the 2v record I just wanna know I didn't waste 3G going from a 500hp blower just to make 550 on a turbo.


Thanks fellas
Even if it did only make 550 as a peak number, the car will pull way better because you will have a lot more midrange tq from the turbo setup vs the centri blower. Just sayin'.

I went from just over 500rwhp with a T-trim on my 2005 GT to 550ish (on 92 octane, 16lbs boost) with a T70 and the difference was night and day. The car would spin 285/40-18 Goodyear Supercars at 70mph in 3rd gear on a cool day. Super fun. I eventually turned it up to 640ish rwhp and 700rwtq with the T70, using 100 unleaded.
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