LME 408/ET 245cc head results....
04-05-2006, 08:41 PM
#21
Originally Posted by kumar75150
with that big a cam, im surprised you are getting knock at 11.9:1 compression
doesnt sound right
doesnt sound right
I agree 100%. With that big duration and wide LSA, the dynamic compression has to be in the low 8s...hardly anything that would require timing that low. Could be false knock. Add some Torco. If you still get knock with higher octane, it's not detonation but false knock. 
04-05-2006, 08:43 PM
#22
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whats up doug...
nice, we gotta meet so you can show me that new motor. If you planning any tunning days, let me know, got a car that needs a tune and dyno time...
Angel
nice, we gotta meet so you can show me that new motor. If you planning any tunning days, let me know, got a car that needs a tune and dyno time...
Angel
04-05-2006, 08:44 PM
#23
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Originally Posted by Patrick G
I agree 100%. With that big duration and wide LSA, the dynamic compression has to be in the low 8s...hardly anything that would require timing that low. Could be false knock. Add some Torco. If you still get knock with higher octane, it's not detonation but false knock.well, that was my problem with the 12-15 degree's of knock i was getting!!
04-05-2006, 11:30 PM
#24
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Originally Posted by gtodoug
Well, next mod for me is a possible cam change, and ITB(individual throttle body) manifold from Harrop. If it really adds that much hp. I just want someone else to go first.
It almost seems like you're disapppointed with over 500 rwhp...all motor. Dude, that's nothing to sneeze at. And I'm sure you'll find some more power in it the way it is (with the gift that keeps on giving)
Dave
04-07-2006, 07:18 AM
#27
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Drkphx-I'm going to try and run some more timing. I know that some thermal management is in order via the exhaust. SW sent me a nice email stating the exhaust would be shipping today.
This is what I'm running now:
Single 3" with 30" muffler
I'm installing this system:
dual 3" with x pipe.
This is what I'm running now:
Single 3" with 30" muffler
I'm installing this system:
dual 3" with x pipe.
04-07-2006, 08:40 AM
#28
That exhaust looks like it will make a DRAMATIC difference in power at your level. Good luck with it!
__________________
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
04-07-2006, 10:59 AM
#29
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so 548 open headers...
not bad, BUT like its been said, you should be running more like 28* timing. I'd be looking for the problem there before you go farther. NO WAY should you be only 15-17*. you're probably leaving 20-30hp on the table there and more with the a/f. really looking forward to seeing final numbers. I would hope ETP 245's open headers and a nice hydraulic cam would make close to 600rwhp.
not bad, BUT like its been said, you should be running more like 28* timing. I'd be looking for the problem there before you go farther. NO WAY should you be only 15-17*. you're probably leaving 20-30hp on the table there and more with the a/f. really looking forward to seeing final numbers. I would hope ETP 245's open headers and a nice hydraulic cam would make close to 600rwhp.
04-07-2006, 11:28 AM
#30
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I will tell you the most we could run with my ET245`s was 22 degrees. Anymore and I started to lose power bigtime. The heads flow so we`ll-they outflow my 90mm intake. I have talked with ET and Mike at G-Force. Mike said ET recommends me going to a higher flowing intake and my numbers would jump bigtime! That also is in my future! But for now I`m going to run her and see what I have at the track.! Even when we locked the converter once. I still had over 500TRQ with my A4. My curve is LONG and FLAT. Don`t know why. but I love it!!
04-07-2006, 12:28 PM
#31
I'll be doing a write up on fitting the Harrop in a F-body here towards the end of the month. If your thinking about getting one, you might want to put your name on the waiting list, cause I've been waiting a while. As for your set-up, i think it's doing great. With the addition of timing and getting your exaust done, you'll be on up there. 550+ is outstanding for a 408.
04-07-2006, 01:32 PM
#33
You still have plenty left in it like everyone claims! I think you will be more than happy with the final outcome. Now get that KR figured out and get back to it, maybe give Jeremy a chance to have a look at it also!
04-07-2006, 02:50 PM
#35
Originally Posted by kumar75150
so what are the options for an intake for a street car?
is there anything between the fast 90 and the harrop?
is there anything between the fast 90 and the harrop?
04-07-2006, 05:15 PM
#36
i made 550 rwhp 501 rwtq with my 408 vette full exhaust, 254-266 .646"-646" lift 113 lsa cammotion grind cam, out of the box afr 225's, out of the box fast 90/NW 90 tb, kooks 17/8's headers, dual 2.5 inch GHL's, your power seems low, considering those heads should flow much more then mine, but i think the problem that everybody is having is the FAST manifold simply cant flow that much air.
Last edited by RyneZ06; 04-07-2006 at 06:57 PM.
04-07-2006, 05:23 PM
#37
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I'm with ya Ryne, nice car by the way. I'm really wanting to finish up the current setup after I change the exhaust and look into the a new manifold.
dougie
dougie
04-07-2006, 06:57 PM
#38
well i think the exhaust will help out alot. my went with dual 3inch spintechs on his vette from dual 2.5 inch ghls pick up 15 rwhp, from 485-500 rwhp. this is on a mild 408 vette. i can imagine that you corsa exhaust flows less then the ghl's , so you may pick up close to 20 rwhp increase.
04-07-2006, 09:01 PM
#39
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I hope the pickup is that dramatic! I'm really hoping with the addition of the exhaust I'm able to run some more timing. This is still a WIP(work in progress) and I'm hoping my assumptions are right.
Dougie
Dougie