View Poll Results: Which Engine?
LS2
8
21.62%
L92
29
78.38%
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Ls2 or L92 for D1sc
Thread Starter
Launching!
Joined: Jul 2005
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Ls2 or L92 for D1sc I am possibly looking into supercharging my z28 this summer and was wondering which engine would be better to use.
The heads i would use would be tsp's ported L92 heads. Would it be a better idea to use the ls2 block for the simple reason being the l92 heads flow a lot for a n/a ls2 so when the car is supercharged it would make more power with less boost? Or just use a L92? The car is just going to be a street car and hardly taken to the track.
The heads i would use would be tsp's ported L92 heads. Would it be a better idea to use the ls2 block for the simple reason being the l92 heads flow a lot for a n/a ls2 so when the car is supercharged it would make more power with less boost? Or just use a L92? The car is just going to be a street car and hardly taken to the track.
Thread Starter
Launching!
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I'm just wondering if the ls2 would be better for the street just because it seems that everyone agrees that when you put a very high flowing head on a forced induction engine you don't have to run as much boost to make a ton of power. So in theory by putting the ported l92 heads on the smaller bore ls2 it will make a lot more power with lower boost. Or in the l92s case is the difference in bore size not as much of a deal?
Does anyone know if the l92's stock crank is as strong as the ls1's? Only reason why im wondering because the l92 crank is real cheap. I'm just trying to get as much information on both of the set ups before i decide to start doing anything.. If at all possible could either one of the engines with a D1sc support a 7400rpm redline?
Does anyone know if the l92's stock crank is as strong as the ls1's? Only reason why im wondering because the l92 crank is real cheap. I'm just trying to get as much information on both of the set ups before i decide to start doing anything.. If at all possible could either one of the engines with a D1sc support a 7400rpm redline?
well the redline will be limited by the valvetrain mainly and not the rotating assembly if all is equal. So yes either one of those engines could be setup to easily handle 7400 rpm redline. I would go l92 no questions asked if you have the choice. The l92's will shine on the 4" bore even though it is smaller than what it was designed for. I am not sure about the strength of the l92 crank however I imagine it is just as strong if not stronger as the ls2/1 crank. Cheers and good luck on the project.
I'd do with the L92 and use an F1A ProCharger, which I offer here.
http://www.exoticperformanceplus.com....html?item=798 Bob
http://www.exoticperformanceplus.com....html?item=798 Bob
How are the L76 intakes doing with the L92 heads on boost? I know LS6 intakes are supposed to do great, but what about the L76? I was thinking about a LQ9 and LS6 intake setup for my 370. Now im wonderingabout the L92/L76 combo. Hummmmm. Would i be dub to get the LQ9/LS6 over the L92/L76? Im also on a D1SC build and trying to decide. Would the L92s be too much head for a 370 inch motor?
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Thread Starter
Launching!
Joined: Jul 2005
Posts: 267
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Wouldn't the f1a be more for a drag car then street car? I'm only looking for 650-800rwhp max.. Only reason i was asking which block is because it seems pointless to redo a ls1 and spend all the money on it when for around the same price i can get all the new engine stuff. Just trying to figure out what i want to do either the sc or a stroker but the sc seems to be a better choice for the main reason the car is a street car and will get decent gas mileage with the sc. Bob could the d1sc support a 7400 rpm redline? I just don't want to go crazy and build something so powerful it can't be driven on the road anymore and i know what i want is already pushing it for a street car..
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Originally Posted by 98 Z28
Wouldn't the f1a be more for a drag car then street car? I'm only looking for 650-800rwhp max.. Only reason i was asking which block is because it seems pointless to redo a ls1 and spend all the money on it when for around the same price i can get all the new engine stuff. Just trying to figure out what i want to do either the sc or a stroker but the sc seems to be a better choice for the main reason the car is a street car and will get decent gas mileage with the sc. Bob could the d1sc support a 7400 rpm redline? I just don't want to go crazy and build something so powerful it can't be driven on the road anymore and i know what i want is already pushing it for a street car..
Thread Starter
Launching!
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Originally Posted by ty_ty13
hmmm.... you must not realize how much power 700fwhp is.... its a handful on the street with my 275/65 15 MT dragradials... a fast "street" car will be 600fwhp.... it doesnt sound like your very familiar with fast cars and i would not sugest jumping in a 800fwhp car and trying to drive it every day with no other experience... alot of guys talk like its easy to have a car like this but they arent telling the whole story of maintenence and problems that occur.... its a machine with 100's of parts and they all have to function together very well for it to work great on the street....
Thread Starter
Launching!
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Originally Posted by Juiced
i would do l92 block but 6.0 heads, the L92 heads seem to have problem keeping gaskets together under boost.
TECH Resident
Joined: Jan 2007
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From: Texas
I would go L92 all the way, with forged rods and pistons with ARP or Katech rod bolts. You won't need to port the heads, just put in high quality lightweight valvetrain components with Caddy racing lifters, hardened pushrods, Yella Terra "Ultra Light" rockers. Setup your D1SC with 8-rib pulley for max boost of 9-10 psi at 7400 rpm and you will have a 700rwhp screamer, EASY ! My LS1 setup puts down 657rwhp with 9.4 psi at 6500 rpm. My rev limiter is set to 6900 rpm just so I don't bounce off of it all the time. Plenty of power down low, but more on top when I have that open stretch of road to scream a little.
With the L92 setup you'll blow my numbers out of the water, with more torque down low ! ! !
With the L92 setup you'll blow my numbers out of the water, with more torque down low ! ! !
Thread Starter
Launching!
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Originally Posted by NemesisC5
I would go L92 all the way, with forged rods and pistons with ARP or Katech rod bolts. You won't need to port the heads, just put in high quality lightweight valvetrain components with Caddy racing lifters, hardened pushrods, Yella Terra "Ultra Light" rockers. Setup your D1SC with 8-rib pulley for max boost of 9-10 psi at 7400 rpm and you will have a 700rwhp screamer, EASY ! My LS1 setup puts down 657rwhp with 9.4 psi at 6500 rpm. My rev limiter is set to 6900 rpm just so I don't bounce off of it all the time. Plenty of power down low, but more on top when I have that open stretch of road to scream a little.
With the L92 setup you'll blow my numbers out of the water, with more torque down low ! ! !
With the L92 setup you'll blow my numbers out of the water, with more torque down low ! ! !
Lol looks like 60mph in first gear would be possible with the th400 at 7400 rpms..
TECH Resident
Joined: Jan 2007
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From: Texas
Originally Posted by 98 Z28
L92 seems to be the recommended engine. will the caddy lifters work on the l92 heads? honestly i'd be happy if i could acheive around the same numbers as you with the l92 at 10lbs of boost... But it will probably be lower because i have a auto and if i end up doing the l92/d1sc this summer i will go with a th400.
Lol looks like 60mph in first gear would be possible with the th400 at 7400 rpms..
Lol looks like 60mph in first gear would be possible with the th400 at 7400 rpms..
Thread Starter
Launching!
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Nemesis that is more less what i was trying to figure out is with the high flowing heads whether or not less boost is needed to make more power.. By needing less boost to make more power is that in return going to be easier on the parts so there will be less parts breaking? Or is breaking parts more often just a product of power?
The D1sc is probably what i'm going to end up doing hopefully this summer just because it will be more streetable/better gas mileage.. I like the idea of a 402 or 416 stroker with a itb or sheetmetal intake but the supercharger is probably more streetable.. I'll have to wait and see what i do this summer i want to get the supporting parts first then not have to worry as much about breaking parts.. Thanks for the info guys
The D1sc is probably what i'm going to end up doing hopefully this summer just because it will be more streetable/better gas mileage.. I like the idea of a 402 or 416 stroker with a itb or sheetmetal intake but the supercharger is probably more streetable.. I'll have to wait and see what i do this summer i want to get the supporting parts first then not have to worry as much about breaking parts.. Thanks for the info guys
good flowing heads will help without a doubt but aren't as critical in f/i applications.
when you start making more power in general, the weak links are going to surface. it also depends on how hard you are ragging on your car.
I ran on my stock trans with a shift kit and stock 10 bolt on my setup and they have lasted but I dont go racing my car every weeek. I do have fun with her when I drive it.
when you start making more power in general, the weak links are going to surface. it also depends on how hard you are ragging on your car.
I ran on my stock trans with a shift kit and stock 10 bolt on my setup and they have lasted but I dont go racing my car every weeek. I do have fun with her when I drive it.
TECH Resident
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From: Texas
Originally Posted by 98 Z28
Nemesis that is more less what i was trying to figure out is with the high flowing heads whether or not less boost is needed to make more power.. By needing less boost to make more power is that in return going to be easier on the parts so there will be less parts breaking? Or is breaking parts more often just a product of power?
The D1sc is probably what i'm going to end up doing hopefully this summer just because it will be more streetable/better gas mileage.. I like the idea of a 402 or 416 stroker with a itb or sheetmetal intake but the supercharger is probably more streetable.. I'll have to wait and see what i do this summer i want to get the supporting parts first then not have to worry as much about breaking parts.. Thanks for the info guys
The D1sc is probably what i'm going to end up doing hopefully this summer just because it will be more streetable/better gas mileage.. I like the idea of a 402 or 416 stroker with a itb or sheetmetal intake but the supercharger is probably more streetable.. I'll have to wait and see what i do this summer i want to get the supporting parts first then not have to worry as much about breaking parts.. Thanks for the info guys
Just as in N/A, you want to decrease restriction from intake to exhaust. Case in point: I have LS6 intake/ported throttle body/ported MAF and make 657rwhp with 9.4psi. I am switching to FAST 90/90 with 85mm ZO6 MAF and hope to gain 15-20rwhp while I see small decrease in boost. I'll keep you posted once I get my car re-tuned and dynoed. This is the theory, I hope it works for me
Thread Starter
Launching!
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Good luck with the upgrades. It will be interesting what it picks up with the fast intake. Some people say all you need is the ls6 intake so it will be interesting.. Let us know how it does with the new intake
It will be interesting what it picks up with the fast intake. Some people say all you need is the ls6 intake so it will be interesting.. Let us know how it does with the new intake