What do you think it will make???
02-02-2009, 07:46 PM
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What do you think it will make??? I have a Pontiac Trans Am WS6, 52000 miles. I have a K&N filter through Ram Air, 58mm Throttle Body, Throttle Body by-pass, MSD Opti, Underdrive & Alternator Pullies, 11:1 Compression, LT4 Heads (Ported/Polished/Gasket matched) LT4 intake manifold (Ported/Polished/Gasket matched) Comp Cam 230/236 Duration, Pacesster LT Ceramic Coated, True Dual Exhuast, Smooth Bellow, EGR & AIR delete, Spec Stage 3 Clutch w/Steel Flywheel, 42 lb Injectors, 4.10's. The car will be going on the dyno in the next few weeks. Just curious what numbers you think it will make...
02-02-2009, 08:05 PM
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Eleventy 1 THOUSAND.... and one half. HP and TQ!
310hp and 330tq w/o a tune.
And not to be a ********, but it'll come across like that, saying you have LT4 stuff only makes us think "Man, what a poor sap who wasted his money
". I'd stick to just saying "H/C/I" for Heads, Cam, Intake. 
heh Sorry.
310hp and 330tq w/o a tune.
And not to be a ********, but it'll come across like that, saying you have LT4 stuff only makes us think "Man, what a poor sap who wasted his money
". I'd stick to just saying "H/C/I" for Heads, Cam, Intake. heh Sorry.
02-02-2009, 08:11 PM
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Eleventy 1 THOUSAND.... and one half. HP and TQ!
310hp and 330tq w/o a tune.
And not to be a ********, but it'll come across like that, saying you have LT4 stuff only makes us think "Man, what a poor sap who wasted his money". I'd stick to just saying "H/C/I" for Heads, Cam, Intake. heh Sorry.
310hp and 330tq w/o a tune.
And not to be a ********, but it'll come across like that, saying you have LT4 stuff only makes us think "Man, what a poor sap who wasted his money
". I'd stick to just saying "H/C/I" for Heads, Cam, Intake. heh Sorry.
02-02-2009, 08:50 PM
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Yea, except after you port an LT1 and LT4 intake/heads, you basically have the same end result. The LT4 heads only offer a slight benefit when ported almost as far as they can be vs LT1's. That's what I meant by it's a waste, since you could've stuck with the factory heads and intake. I should've mentioned that to begin with I guess :\ Didn't want it to sound like a rant though heh
02-02-2009, 09:40 PM
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Yea, except after you port an LT1 and LT4 intake/heads, you basically have the same end result. The LT4 heads only offer a slight benefit when ported almost as far as they can be vs LT1's. That's what I meant by it's a waste, since you could've stuck with the factory heads and intake. I should've mentioned that to begin with I guess :\ Didn't want it to sound like a rant though heh
I get what your saying, but the LT4 head is a 195 cc, whats a LT1? Makes a bit of a difference right? Than on top of that with p/p? What do you plan on doing with yours?
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02-02-2009, 11:32 PM
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170cc stock LT1 and 195cc stock LT4. It's been awhile since I looked at the cross section cuts of the LTx heads, and I thought that the LT1 had more meat that could be cut away than it actually does. So really the LT4 heads aren't a bad buy if you have a lot of money to drop and are making tons of HP.
A = LT1 & B = LT4
http://www.projectlt10.com/images/lt1vs4/intake-400.jpg
Here's a decent chart, although quite lacking in info (like AI and LE's port jobs). And how Modern Musclecar managed to screw up their flow baffles me lol
http://www.malcams.com/legacy/misc/headflow.htm
So factor in the cost of the LT4 heads (not very cheap) and then the cost to have them ported out, you could've dumped that money elsewhere. Like buying a cam, springs, roller rockers and still probably have enough for injectors lol
My plans, I have none Get my transmission back in my car is the current plan! 
A = LT1 & B = LT4
http://www.projectlt10.com/images/lt1vs4/intake-400.jpg
Here's a decent chart, although quite lacking in info (like AI and LE's port jobs). And how Modern Musclecar managed to screw up their flow baffles me lol
http://www.malcams.com/legacy/misc/headflow.htm
So factor in the cost of the LT4 heads (not very cheap) and then the cost to have them ported out, you could've dumped that money elsewhere. Like buying a cam, springs, roller rockers and still probably have enough for injectors lol
My plans, I have none
Get my transmission back in my car is the current plan! Last edited by Formula350; 02-07-2009 at 06:09 PM. Reason: decent *chart*, typo.
02-03-2009, 09:59 PM
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I'm hoping for around 400, but we shall see what happens. The car will be tuned on a dyno jet, which is known for being "forgiving" when it comes to numbers. But whatever it says I will go with, haha. I hope to get more feedback, thanks to those who have already.
02-03-2009, 10:16 PM
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170cc stock LT1 and 195cc stock LT4. It's been awhile since I looked at the cross section cuts of the LTx heads, and I thought that the LT1 had more meat that could be cut away than it actually does. So really the LT4 heads aren't a bad buy if you have a lot of money to drop and are making tons of HP.
A = LT1 & B = LT4
http://www.projectlt10.com/images/lt1vs4/intake-400.jpg
Here's a decent charge, although quite lacking in info (like AI and LE's port jobs). And how Modern Musclecar managed to screw up their flow baffles me lol
http://www.malcams.com/legacy/misc/headflow.htm
So factor in the cost of the LT4 heads (not very cheap) and then the cost to have them ported out, you could've dumped that money elsewhere. Like buying a cam, springs, roller rockers and still probably have enough for injectors lol
My plans, I have none Get my transmission back in my car is the current plan!
A = LT1 & B = LT4
http://www.projectlt10.com/images/lt1vs4/intake-400.jpg
Here's a decent charge, although quite lacking in info (like AI and LE's port jobs). And how Modern Musclecar managed to screw up their flow baffles me lol
http://www.malcams.com/legacy/misc/headflow.htm
So factor in the cost of the LT4 heads (not very cheap) and then the cost to have them ported out, you could've dumped that money elsewhere. Like buying a cam, springs, roller rockers and still probably have enough for injectors lol
My plans, I have none
Get my transmission back in my car is the current plan! 
02-07-2009, 06:14 PM
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02-10-2009, 05:33 PM
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I'm planning on having the tune sometime next week. It will be on a dynojet, i'm hoping that after all of that crap she turns some decent numbers. If your guess is right I'd be happy. I'm hoping for 400, but as long as it's close...