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Post by 1bad2k2ta on Sept 29, 2005 20:52:08 GMT -5
I have the cast iron heads. Dave Okay. What is your static compression ratio and are you running an intercooler? |
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Post by impaladave on Sept 30, 2005 11:30:31 GMT -5
I'm not sure what static and dynamic is, but I'm supposed to be at about 9.5:1 or just a hair under for the head work and gaskets.
I have no intercooler, I'm undecided between an expensive Air/Air set up and just spraying it with alcohol injection. I believe the injection brings intake air temps lower than outside air temps, and there's no boost loss across the intercooler.
Dave
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Post by Fire67 on Sept 30, 2005 11:44:39 GMT -5
Fire67, You got 450RWHP with 8psi on the stock motor!WOW! I can't get that with 10psi on my forged, ported head, 355  I was running out of fuel, and I'm non intercooled so the tuner must have pulled out huge amounts of timing to compensate for the detonation. Any theories? I have a fortune into this thing, and was looking for like 450-500 at the wheels. Dave I also am not running cats and have BIG (4") exhaust. My motor is completely stock except gasket matched heads & intake. (yes even the valvetrain) I have an 8psi pulley and Im running twin intercoolers. I made 453hp at 6500 rpms where i actually get 10psi. I'd say intercooling would easily make up the 50hp difference... But your right, you should be able to get more out of it. That 112 lobe separation is definitely hurting you some, and so are the cast iron heads... They dont keep combustion chambers as cool so you cant run as much timing... The alky is a great idea and i think it would really wake that motor up. The Alky allows more timing, less fuel (replaced by alky), and of course drops IAT's considerably. In most cases you can add the alky and about 5psi to get a nice increase in power. 5 more psi, more timing, and a cooler charge should put you up there in the numbers nicely... If you are willing to change your heads, a set of aluminum LT1 heads that you port yourself would be a relatively cheap upgrade over what your running. |
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Post by Fire67 on Sept 30, 2005 11:46:03 GMT -5
Oh yeah, Welcome to the board Dave!!! I just pm'd you yesterday on LT1tech and then noticed this thread today.
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Post by 1bad2k2ta on Sept 30, 2005 11:58:27 GMT -5
Fire67, You got 450RWHP with 8psi on the stock motor!WOW! I can't get that with 10psi on my forged, ported head, 355 I was running out of fuel, and I'm non intercooled so the tuner must have pulled out huge amounts of timing to compensate for the detonation. Any theories? I have a fortune into this thing, and was looking for like 450-500 at the wheels. Dave I also am not running cats and have BIG (4") exhaust. My motor is completely stock except gasket matched heads & intake. (yes even the valvetrain) I have an 8psi pulley and Im running twin intercoolers. I made 453hp at 6500 rpms where i actually get 10psi. I'd say intercooling would easily make up the 50hp difference... But your right, you should be able to get more out of it. That 112 lobe separation is definitely hurting you some, and so are the cast iron heads... They dont keep combustion chambers as cool so you cant run as much timing... The alky is a great idea and i think it would really wake that motor up. The Alky allows more timing, less fuel (replaced by alky), and of course drops IAT's considerably. In most cases you can add the alky and about 5psi to get a nice increase in power. 5 more psi, more timing, and a cooler charge should put you up there in the numbers nicely... If you are willing to change your heads, a set of aluminum LT1 heads that you port yourself would be a relatively cheap upgrade over what your running. You beat me to the punch....d@mned dial-up. ;D I agree, almost exactly what I was going to say. I would only add that if you go alky, take it and get it dyno tuned, and never let the tank run dry.  Also, methanol is very corrosive, so you should periodically check the whole system for any corrosion, clogging, puddling, etc. I am a low-maintenance kind of guy, so I prefer the air to air intercoolers. You could ultimately make more power with the alky, or if you go with intercoolers, you can get a second "race" tune and use like 109 octane unleaded for the track. I think I may do this because I make more power now than I can use on the street, but at the track, more is always better. ;D |
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Post by impaladave on Sept 30, 2005 12:28:58 GMT -5
Thanks Fire, I love talking about this stuff ( it's very addicting)
Also,
Thanks for the help guys, it's really frustrating when you spend the kind of money we spend, and don't get the results we expected.
Well, off to go camping with the kids, have a great weekend guys.
Dave
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Post by Fire67 on Sept 30, 2005 13:36:01 GMT -5
Thanks Fire, I love talking about this stuff ( it's very addicting) Also, Thanks for the help guys, it's really frustrating when you spend the kind of money we spend, and don't get the results we expected. Well, off to go camping with the kids, have a great weekend guys. Dave I know what you mean about the money, the 6psi powerdyne I used to run had me constantly dissapointed. I only mustered 364hp 350ft-lb on the same setup except the blower and transmission  I installed the T-56 and broke the Powerdyne so along came the D1-SC and a dyno tune to net 453hp and 430ft-lbs I expected a gain, but not a gain like that. 5 more psi on the gage, and intercooling were the main differences that credited to the 89hp gain over the powerdyne. My baseline dyno pull before tuning netted 431hp 400ft-lbs on the pcmforless tune I ran with the powerdyne ;D 1bad2kta: When you gonna crank up the boost on thing? That'd be one helluva ride with just 6 ;Dmore psi |
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Post by 1bad2k2ta on Sept 30, 2005 16:06:52 GMT -5
Thanks Fire, I love talking about this stuff ( it's very addicting) Also, Thanks for the help guys, it's really frustrating when you spend the kind of money we spend, and don't get the results we expected. Well, off to go camping with the kids, have a great weekend guys. Dave I know what you mean about the money, the 6psi powerdyne I used to run had me constantly dissapointed. I only mustered 364hp 350ft-lb on the same setup except the blower and transmission I installed the T-56 and broke the Powerdyne so along came the D1-SC and a dyno tune to net 453hp and 430ft-lbs I expected a gain, but not a gain like that. 5 more psi on the gage, and intercooling were the main differences that credited to the 89hp gain over the powerdyne. My baseline dyno pull before tuning netted 431hp 400ft-lbs on the pcmforless tune I ran with the powerdyne ;D 1bad2kta: When you gonna crank up the boost on thing? That'd be one helluva ride with just 6 ;Dmore psi It is being done as we speak. Waiting on another tensioner from SDCE (1st one broke). Going from a 3.7 to 3.4 compressor pulley. Also reinstalling stock slave/throw-out and a slightly used (500 miles) rebuilt beefed up tranny that still hasn't shipped. SDCE claims approximately 680 rwhp @ 12 psi with this setup. I expect to only see about 10 psi because my heads flow really well on the exhaust side. 248-254 cfm at .550-.600 lift. My cam and 1.8 rockers give me .563 lift, so should be flowing right about 250 cfm. Ideal for s/c. |
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Post by Fire67 on Oct 3, 2005 8:40:52 GMT -5
Cool let us know how it turns out!
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Post by drewz28 on Oct 26, 2005 16:02:28 GMT -5
Well, I melted the #7 piston with 8 psi on a stock motor. So this time I'll run forged pistons with 12 psi and see where that gets me. ;D I've got a Procharger P1SC with twin high-flow intercoolers. I was running 106 octane low lead fuel, but I'll start running 110 fully leaded gas with the new motor.
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Post by impaladave on Nov 17, 2005 19:54:26 GMT -5
Drew,
that sucks! That's the same piston and psi that killed my perfect 45000 mile motor.
Good luck with the rebuild.
Dave
Fire67,
I've been checking the S/C section of the forum and haven't seen too much action, so I decided to let you know that I decided on an air/air custon intercooler set up ( not cheap). I also plan to run 12psi with the new intercooler. I am hoping for 500rwhp, what do you think?
I should know by next friday, can't wait,
Dave
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Post by 94m6hardtopz on Nov 18, 2005 14:42:22 GMT -5
we made 508 rwhp on my buddies bone stock motored 93 cobra. that was with a non intercooled vortech s-trim at 16 psi. it was running race gas. it finally split the block, but the hyperutectic pistons were fine.
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Post by drewz28 on Nov 20, 2005 10:50:12 GMT -5
we made 508 rwhp on my buddies bone stock motored 93 cobra. that was with a non intercooled vortech s-trim at 16 psi. it was running race gas. it finally split the block, but the hyperutectic pistons were fine. d@mn that's impressive. Glad I just busted a piston. |
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Post by 1bad2k2ta on Nov 20, 2005 11:43:54 GMT -5
we made 508 rwhp on my buddies bone stock motored 93 cobra. that was with a non intercooled vortech s-trim at 16 psi. it was running race gas. it finally split the block, but the hyperutectic pistons were fine. d@mn that's impressive. Glad I just busted a piston. I have heard about the Mustangs splitting the blocks, it is fairly common. There is a girdle you can get now that bolts up in what would normally be the lifter valley that will prevent this. You have to drill and tap some holes, but the bosses are already there. |
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Post by 94m6hardtopz on Nov 20, 2005 18:20:44 GMT -5
the girdles dont prevent it. they just keep everything in place when it comes apart.  |
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Post by Fire67 on Nov 21, 2005 9:52:59 GMT -5
Drew, that sucks! That's the same piston and psi that killed my perfect 45000 mile motor. Good luck with the rebuild. Dave Fire67, I've been checking the S/C section of the forum and haven't seen too much action, so I decided to let you know that I decided on an air/air custon intercooler set up ( not cheap). I also plan to run 12psi with the new intercooler. I am hoping for 500rwhp, what do you think? I should know by next friday, can't wait, Dave I dont think you'll have a problem making those numbers... 12 intercooled psi should make a big difference over 10psi? non-intercooled. Let us know how it turns out. Cant wait to hear about your results. |
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Post by impaladave on Nov 21, 2005 13:40:23 GMT -5
Thanks Fire,
I need to wait till the end of next week, the guys at Dez racing are down in Fla for some sort of performance parts show.
I'll post as soon as I get some numbers.
Dave
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Also, methanol is very corrosive, so you should periodically check the whole system for any corrosion, clogging, puddling, etc. I am a low-maintenance kind of guy, so I prefer the air to air intercoolers. You could ultimately make more power with the alky, or if you go with intercoolers, you can get a second "race" tune and use like 109 octane unleaded for the track. I think I may do this because I make more power now than I can use on the street, but at the track, more is always better. ;D
