APS twin turbo what size of engine to get?
11-19-2007, 09:50 AM
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APS twin turbo what size of engine to get? so i have been reading a lot about the APS twin setup lately, but before i heard of them i was planning on getting a new 408 motor and a turbo to go with it, the APS twin setup seems like a great way to make good power, but from what i have been reading that the APS twin setup is better suited for 346-370cid engines, so my question is for the people who are planning on getting this setup what size engine are you plan on running and why? and if there is anyone in here with a 408 with the APS twin setup please post up your numbers and your experience with this setup thansk i would appreciate it
11-19-2007, 02:06 PM
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well around 800ish, i just want to know what you guys opinion between what size engine to get, what made you guys get the engine you have now? and what kind of numbers are you guys putting up
11-19-2007, 02:10 PM
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If you have a m6 and the right setup your going to put down good numbers. I dont care about my numbers since my setup is thru a 4l80/stall and a 9". And Im about track times.
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11-19-2007, 02:45 PM
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this is the setup that i was thinking about, not sure of the piston yet cuz i dont know if i am going to be needing much boost to get to 800ish
408cid LS1/LQ9 Iron Stroker Long Block
Pistons:
Custom Diamond -28cc Dish, Up To 25 psi Boos
Rods:
Eagle LS1 H-Beam with ARP 8740 Rod Bolts
Crankshaft:
Eagle LS1 Forged Crankshaft
Cylinder Heads:
PRC Stage 3 6.0L 64cc Heads
Intake Manifold:
Intake Manifold FAST/PTM 90mm Intake & TB Combo
408cid LS1/LQ9 Iron Stroker Long Block
Pistons:
Custom Diamond -28cc Dish, Up To 25 psi Boos
Rods:
Eagle LS1 H-Beam with ARP 8740 Rod Bolts
Crankshaft:
Eagle LS1 Forged Crankshaft
Cylinder Heads:
PRC Stage 3 6.0L 64cc Heads
Intake Manifold:
Intake Manifold FAST/PTM 90mm Intake & TB Combo
Last edited by 99 black ss sj; 11-19-2007 at 02:58 PM.
11-19-2007, 04:02 PM
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There's little to no point in someone telling you what block and CI's they're planning if they don't tell you the extent of their plans. Best thing you can do is get out a pen and paper and start writing down what you want out of your build.
Do you want a dyno queen, or proven performer?
Bottomless pockets, or is budget a concern?
Daily driver, or less than 2,000 miles a year?
Fuel economy, emissions, tree huggers???
To shed some light on your question, and I'm no expert by any means, but after plotting some 20+ engine combo's on the APS twins compressor maps, CI's in the 346 to 370 range will work nicely with those turbos. Once you start getting much above 370 ci's, you will quickly run the turbo's into an inefficient range.
Do you want a dyno queen, or proven performer?
Bottomless pockets, or is budget a concern?
Daily driver, or less than 2,000 miles a year?
Fuel economy, emissions, tree huggers???
To shed some light on your question, and I'm no expert by any means, but after plotting some 20+ engine combo's on the APS twins compressor maps, CI's in the 346 to 370 range will work nicely with those turbos. Once you start getting much above 370 ci's, you will quickly run the turbo's into an inefficient range.
11-19-2007, 04:12 PM
#12
Well theory is all fine and good but real world sometimes is quite different.
There already is car on this board with aps twins, 402,afr 205s pushing good power.700rwhp or so at only 9.5 pounds. Don't sound very inefficient to me. Bet they will easily hit 850 rwhp on my planned 408 with afr 225, good cam ,fast 90/Nw 90. But guess the proof will be in the pudding. And bet do it at 15 to maybe 18psi tops. Should have some numbers to look at next season in my car. If they really are too small well APS has a new thread with bigger wheels they are trying out. Now maybe for hard core track guys a bit of mismatch might matter. For street guys how much more than 800 or 850rwhp do you want anyway?
There already is car on this board with aps twins, 402,afr 205s pushing good power.700rwhp or so at only 9.5 pounds. Don't sound very inefficient to me. Bet they will easily hit 850 rwhp on my planned 408 with afr 225, good cam ,fast 90/Nw 90. But guess the proof will be in the pudding. And bet do it at 15 to maybe 18psi tops. Should have some numbers to look at next season in my car. If they really are too small well APS has a new thread with bigger wheels they are trying out. Now maybe for hard core track guys a bit of mismatch might matter. For street guys how much more than 800 or 850rwhp do you want anyway?
11-19-2007, 05:23 PM
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Thanks guys for your input, i will do more research to what i think is best for this setup, my goal is about 800 its going to be a street car , i might take it to the track everynow and then but mosly street car
11-19-2007, 05:37 PM
#14
http://www.exoticperformanceplus.com...Car.php?car=39
Check this Firehawk out that we started with an LS2 block and built an engine, then added an APS Twin Turbo kit. Bob
Check this Firehawk out that we started with an LS2 block and built an engine, then added an APS Twin Turbo kit. Bob
11-20-2007, 07:06 AM
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Well theory is all fine and good but real world sometimes is quite different.
There already is car on this board with aps twins, 402,afr 205s pushing good power.700rwhp or so at only 9.5 pounds. Don't sound very inefficient to me. Bet they will easily hit 850 rwhp on my planned 408 with afr 225, good cam ,fast 90/Nw 90. But guess the proof will be in the pudding. And bet do it at 15 to maybe 18psi tops. Should have some numbers to look at next season in my car. If they really are too small well APS has a new thread with bigger wheels they are trying out. Now maybe for hard core track guys a bit of mismatch might matter. For street guys how much more than 800 or 850rwhp do you want anyway?
There already is car on this board with aps twins, 402,afr 205s pushing good power.700rwhp or so at only 9.5 pounds. Don't sound very inefficient to me. Bet they will easily hit 850 rwhp on my planned 408 with afr 225, good cam ,fast 90/Nw 90. But guess the proof will be in the pudding. And bet do it at 15 to maybe 18psi tops. Should have some numbers to look at next season in my car. If they really are too small well APS has a new thread with bigger wheels they are trying out. Now maybe for hard core track guys a bit of mismatch might matter. For street guys how much more than 800 or 850rwhp do you want anyway?
As far as the real world goes, using the APS F-Bod kit for a reliable DD street car, I wouldn't go any larger than a 370. That certainly doesn't mean a 408 won't work on the street - but if I were to build that combo, I wouldn't use the turbo's in the APS kit for it. Perhaps their compressor upgrade would be better suited for a 408.
Last edited by TAQuickness; 11-20-2007 at 08:48 AM.
11-20-2007, 04:10 PM
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Ill have numbers for you in 1 1/2 weeks. But like I said before I dont care about numbers 
https://ls1tech.com/forums/forced-induction/794084-finally-got-work-my-car.html
https://ls1tech.com/forums/forced-induction/794084-finally-got-work-my-car.html