My 383 rwhp estimate?
09-11-2013, 10:32 PM
#23
09-13-2013, 11:41 AM
#27
How did you come up with those numbers? My calculations on a CR calculator shows that I would be around 10.8:1. . . . . . My bore is 4.03, stroke 3.75, chamber volume 55, Head gasket thickness .032, Head gasket bore 4.06, piston to deck height .10, dished piston 16cc = 10.8.94:1? Just curious. . . . . .
09-13-2013, 04:41 PM
#28
You could do a chinese turbo, some 88-98 chevy pickup shorty headers turned backwards, homemade hot side, ebay cold side, and a tune and have a nice setup for 600rwhp or more for decently cheap. I dont konw what your fiance was going to spend on the turbo, but go chinese turbo and spend wisely elsewhere and you can finish a turbo kit for as much as alot of companies charge for just a turbo *(~$3000). Or Id honestly pull those pistons and get some flattops if you want to stay NA.
09-13-2013, 05:06 PM
#29
09-14-2013, 08:18 AM
#30
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How did you come up with those numbers? My calculations on a CR calculator shows that I would be around 10.8:1. . . . . . My bore is 4.03, stroke 3.75, chamber volume 55, Head gasket thickness .032, Head gasket bore 4.06, piston to deck height .10, dished piston 16cc = 10.8.94:1? Just curious. . . . . .
09-15-2013, 09:52 PM
#31
I wasnt trying to boost initially, But if my CR was what RamAir said it was I would build it then boost it. But my CR isnt 9:5 so i will go ahead with the build. I dont even need to change pistons. . . . . . . Kinda what I figured. . . . . . .
09-16-2013, 08:08 AM
#34
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Your valves won't bottom out, I run .275 dome pistons and still have plenty of room with .620 lift on a .52 gasket. So do the math, you'll have plenty of room, and there's plenty of ways to test if you have enough room.
09-16-2013, 12:57 PM
#35
Dude I'd double check all your/machinist's measurements to confirm compression. Use the calculator someone posted.
My engine's final compression calculation was 11.08:1 and that was with the same head chamber (55cc), same -16cc inverted dome/dish piston relief, and "Mr. Gasket" .026 head gasket. I don't have my block deck spec handy but you and I can't possibly be 1-1.5 whole compression points off just based on the block... ???
My engine's final compression calculation was 11.08:1 and that was with the same head chamber (55cc), same -16cc inverted dome/dish piston relief, and "Mr. Gasket" .026 head gasket. I don't have my block deck spec handy but you and I can't possibly be 1-1.5 whole compression points off just based on the block... ???
09-16-2013, 01:12 PM
#36
My final compression ratio ended up being 10.88:1.... with mahle -16cc dished pistons, the piston .020 ( I think) below the deck, 54cc chambers, and the same 0.26 gaskets. stroke was 3.75, 4.03 bore, 4.06 gasket hole.... I can't think of anything else.
No real good numbers on it yet.
No real good numbers on it yet.
Last edited by Quazz; 09-16-2013 at 01:19 PM.
09-16-2013, 01:29 PM
#37
My final compression ratio ended up being 10.88:1.... with mahle -16cc dished pistons, the piston .020 ( I think) below the deck, 54cc chambers, and the same 0.26 gaskets. stroke was 3.75, 4.03 bore, 4.06 gasket hole.... I can't think of anything else.
No real good numbers on it yet.
No real good numbers on it yet.
09-16-2013, 03:22 PM
#38
Thing is I didnt put a catalogue build together, at least for the time I didnt think so. I just chose to get a decent set of heads and have my machinist go at it. I thought about doing LE, but after doing research and talking to people who uses his products their have been a lot of complaints on his porting jobs and having different valve lengths. I did not want to ship my heads to him an be the guy that gets the screwed up heads. Plus LE is an internet sensation for LT1 guys who dont have a reputable machine shop or doesnt have a shop in a 400 mile radius. Most LT1's arent running LE setups and are outrunning LE(JMHO). I think their SOME local shops can port just as good or better than LE. I chose a 280XFI cam because im not driving a race car so i wouldnt get that much more performance out of getting a custom cam. There are some things that I would totally do different next time (H/C/I), but as this being my first build i think i did pretty well. Hopefully I will have the numbers to show soon after the tune!
09-16-2013, 04:46 PM
#39
The thing about all that is that "almost 430 rwhp" through an m6 and a 10 bolt isnt very impressive. You can get that with LE2s or AI200s on a stock bottom end. Yes, 430rwhp would be fun, especially coming from a 300rwhp bolton only car, but the issue is that for the same amount of money, just spent differently, could have gotten you 450, or more hp. 95ramairTA puts down 455 through a 4l60e and a 9", assuming 18% loss through an auto and a 9", doing the math to 13% through an m6, thats 482rwhp...and his AI200s cost the same as your trickflows, and your -16cc pistons cost the same as his flattops giving him 12.7:1, and his custom AI cam gives the same streetability as your off the shelf comp, and a tune costs the same as a tune. Theres many others making over 420 on stock bottom ends, daily driven, through an M6 and a 10 bolt. I think 11:1 with the 0.026 head gasket will help, but at the end of the day, you left 50 or more hp on the table by going with a catalog build. Either way, ENJOY IT!