bang for the buck lt1
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bang for the buck lt1 New to this board but there looks to be alot of lt1 and lt4 literate people. I am getting ready to stroke (383) my 94 lt1. considering new heads, cam and possible lt4 manifold. Heads i am looking at the lt4 afr 195cc P#1031 heads. wondering if this combo is much better than the 180cc afr heads for the lt1 or not. This is going into a rock buggy with which we go to the sand dunes where i run some nitrous. Any help? Need some cam advice. Going to keep the compression at stock.
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Originally Posted by enisguy
AFR 195s will flow a lot more than 180s.
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Originally Posted by 5432LT1
what about the gm 847 grind?
ive heard some amazing things about it..i dont know if its what youre looking for though.
ive heard some amazing things about it..i dont know if its what youre looking for though.
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-Is this an auto or stick?
-How often are you actually going to be using the spray? How big of a shot?
-How much hp are looking to achieve?
-Staying with fuel injection or going with carb?
Depending on these answers, you may consider just porting the stock LT1 heads. Well ported LT1's should easily obtain 480fwhp NA on a 383-396 combo with the right cam. Since you want to retain some rock crawling ability, I'd veer away from the large runners of the AFR heads IMHO.
Mike
-How often are you actually going to be using the spray? How big of a shot?
-How much hp are looking to achieve?
-Staying with fuel injection or going with carb?
Depending on these answers, you may consider just porting the stock LT1 heads. Well ported LT1's should easily obtain 480fwhp NA on a 383-396 combo with the right cam. Since you want to retain some rock crawling ability, I'd veer away from the large runners of the AFR heads IMHO.
Mike
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Originally Posted by Mikey 97Z M6
-Is this an auto or stick?
-How often are you actually going to be using the spray? How big of a shot?
-How much hp are looking to achieve?
-Staying with fuel injection or going with carb?
Depending on these answers, you may consider just porting the stock LT1 heads. Well ported LT1's should easily obtain 480fwhp NA on a 383-396 combo with the right cam. Since you want to retain some rock crawling ability, I'd veer away from the large runners of the AFR heads IMHO.
Mike
-How often are you actually going to be using the spray? How big of a shot?
-How much hp are looking to achieve?
-Staying with fuel injection or going with carb?
Depending on these answers, you may consider just porting the stock LT1 heads. Well ported LT1's should easily obtain 480fwhp NA on a 383-396 combo with the right cam. Since you want to retain some rock crawling ability, I'd veer away from the large runners of the AFR heads IMHO.
Mike
I certainly appreciate your help. My biggest concern is using the fuel injection. I plan on increasing the TB and Injectors and computor work. Any suggestions are most welcome.
Originally Posted by heinz57
I have been using a 150 shot on the current motor. We hit the sand dunes about 4 to 5 times a year. I burn about a 10lb per day. We do the cinders about 2 time a year, same usage on the nos.
Originally Posted by heinz57
I certainly appreciate your help. My biggest concern is using the fuel injection. I plan on increasing the TB and Injectors and computor work. Any suggestions are most welcome.
Judging from the 5.38 gears, I'm guessing you have real large tires, 33"+?
Mike
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Originally Posted by Mikey 97Z M6
You might benefit from a nitrous grind cam then. The larger lsa will make it more drivable in slower, rock crawling situations too. The cam I'm running would easily hit 400rwhp and 390rwtq or so on a stroked LT1. It's a comp cams extreme energy 224/236. The original design was a nitrous grind with a 114lsa but I had mine ground on a smaller lsa <112>. I think this cam would be perfect for your application in it's original configuration. It has a little lope on my stock block, but on a 383 or 396 it wouldn't be bad at all.
Truthfully, I wouldn't even worry about a larger tb unless you're after every last hp you can find. I ran the numbers in my sig with a stone stock, unported tb. Many will argue it's not even needed until you start getting real close to the 400rwhp mark and even then, it's only around 5hp. Hardly worth the 300.00+ bones IMHO.
Judging from the 5.38 gears, I'm guessing you have real large tires, 33"+?
Mike
Truthfully, I wouldn't even worry about a larger tb unless you're after every last hp you can find. I ran the numbers in my sig with a stone stock, unported tb. Many will argue it's not even needed until you start getting real close to the 400rwhp mark and even then, it's only around 5hp. Hardly worth the 300.00+ bones IMHO.
Judging from the 5.38 gears, I'm guessing you have real large tires, 33"+?
Mike
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Originally Posted by regorih
the hell with the hotcan,cc306,and the cc305... go with a custom girnd like me 
FMS coustom grind .585intake .595ex, 235,242, 112+4 
FMS coustom grind .585intake .595ex, 235,242, 112+4 
:
Originally Posted by heinz57
Thanks for the tip on the tb. Can I go wilder than the 224/236 with the fuel injection and still have a decent idle. The guy putting the motor together says if the cam won't make it thru emissions then it won't idle, is this the case? HELP
Good luck.
Mike
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Originally Posted by Mikey 97Z M6
You can go as big as you'd like to go with the cam. If you want to retain good low speed rock crawling capabilities you'll want to stay a bit on the smallish side. You can always add more nitrous, but it gets more difficult when you put too large of a cam in there to begin with. It's all in what you can live with though.
Good luck.
Mike
Good luck.
Mike
