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Post by tom400cfi on Oct 3, 2008 15:31:36 GMT -7
ok---I have a question, I run 12.8 my last time out at RMR, but I am only trapping 107 mph What is your question? 12.8/107 is a good ratio, IMO... Much better than my current 12.8/111. You're launching much better than I am.
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Post by Crossfire84 on Oct 3, 2008 17:41:33 GMT -7
ok---I have a question... So what is it?
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nathan
Junior Member
Posts: 66
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Post by nathan on Oct 3, 2008 20:54:28 GMT -7
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Post by tom400cfi on Oct 4, 2008 9:22:51 GMT -7
Why not port the heads you have now, and save $900? They're LS6 heads which are a better starting point than the LS1 heads listed on that link.
Did you ever try the simulated 1/4 mile dyno pull?
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nathan
Junior Member
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Post by nathan on Oct 4, 2008 11:16:44 GMT -7
I wouldn' t buy new ones.. I would have him just do a stage 3 port on mine and put in all new valves, springs, retainers, etc.. I havent done the simulated pull yet.. I am nervous as hell to shift and run a car like that on the dyno.. to me its just an accident waiting to happen..
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Post by tom400cfi on Oct 4, 2008 11:21:36 GMT -7
Ahh, got it on the heads. The 1/4 mile pull shouldn't be any harder on the car than running it at the strip. You could even granny shift it and ignore that part of the curve results, and you don't need to "launch it"....just roll out the clutch in 1st gear like you do starting any dyno session (no the actual pull), then start the actual pull at ~ 2000 RPM in 1st gear, shift at the redline and continue through the end of 4th gear. Shouldn't break anything that wouldn't break at the strip. Make sure that your coolant and IAT's are the same or similar to what you'd see at the strip on a normal evening. EDIT: Here are a couple vids for you to watch... videos.streetfire.net/video/Nissan-Skyline-GTR-r33-EV_89005.htm
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nathan
Junior Member
Posts: 66
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Post by nathan on Oct 4, 2008 11:34:45 GMT -7
this is the guys reply..
" for a full stage 3 port on your LS6 heads. rev racing valves 2.02 1.60 valves,patriot gold springs good to .650 lift. all new valve seals super 7 locks and valve job,shipped back to you for$850.. with your supercharged car you should be seeing 50 whp gains easy without doing anything else. "
then I would throw a cam on top of that, and I think I will be in business with some pretty sick power gains between heads and a cam job, maybe even close to 100HP between them both while leaving my boost the same and not putting on a smaller pulley.
I think close to 520 WHP.. That seems to be some realistic gains by the head job and adding a cam.. dont ya think? I can always add the smaller pulley later on if I need too.. What kind of gains should i expect by just adding the pulley and nothing else? 30 whp? 40? just curious.. that is always my last resort..
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Post by highpockets on Oct 4, 2008 12:48:01 GMT -7
I think your outta control ! JK, Heads will show a nice gain,so will a blower cam. Will it be a 100hp gain ? Better figure exactly what you are after first,that smaller pulley will get you closer for less money.
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nathan
Junior Member
Posts: 66
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Post by nathan on Oct 4, 2008 13:05:44 GMT -7
just from reading online is where I gathered the 100 HP gain.. from ls1 tech to other sites people were gaining anywhere from 40-60 whp with head work on blown cars. then with a blower cam others were seeing awesome gains as well.. your right, will it be 100? i have no idea.. but I am thinking it will be at least 80 worst case.. which will net me 500 wheel worst case, and possibly even quite a bit more.. the one thing I am not sure of though is how much power I will gain by adding 2-3 lbs of boost. I am thinking only like 40 Whp.. what is your guesses? if i left my car 100% alone and just threw on a pulley to 6-7 lbs, what do you think my gains will be as a educated guess? maybe just do a cam and pulley? what kind of gains can I expect from a cam and pulley? will it be safe though?
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nathan
Junior Member
Posts: 66
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Post by nathan on Oct 4, 2008 13:06:58 GMT -7
I think your outta control ! this coming from a 800+ whp z06 twin turbo corvette owner.. riiiiggghhhttt... you say im outta control? i just want 500.. your almost doubling me! hehe jk..
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Post by tachout on Oct 4, 2008 13:20:06 GMT -7
I am pretty sure if it has some sort of Engine Highpockets would find a way to give it more power. I say we strip him of his Vette God Status and just refer to him as Mr. More Power!
I know he has a turbo snowmobile, but have really be frightened to find out about his lawnmower. Anyone brave enough to ask him?
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nathan
Junior Member
Posts: 66
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Post by nathan on Oct 4, 2008 13:31:19 GMT -7
so my employee did some research for me and he found a good option.. same flow #'s as LS6 heads stock for stock but they have bigger combustion chambers which lowers the compression to 9:1 if you slap them on a LS6 engine.. they are the heads off the LQ9 6.0 litre trucks.. then if I port them out I can add a lot more boost and be way safer too.. then add a cam and I should be in business.. what do you think guys? I just dont like the thought of 10.5:1 with more than 7lbs of boost.. but these heads may be the route im looking for to keep my motor safe and powerful as hell with 9lbs of boost, head work and a cam this car of mine should be a monster.... options and opinions are awesome! i love forums for this reason lol.. cgi.ebay.com/ebaymotors/L92-L76-Bare-Cylinder-Heads-LS2-LS7-LQ9-6-0-7-0_W0QQcmdZViewItemQQ_trksidZp3286Q2em20Q2el1116QQitemZ230210441853
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Post by highpockets on Oct 4, 2008 14:07:09 GMT -7
Well if you must know,the heads currently on my car are those heads. They CAN make good power,just keep the boost levels moderate.They will lower your compression as well,and flow extremely nice with some moderate porting.PM me if you want to discuss further,or give me a call.
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nathan
Junior Member
Posts: 66
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Post by nathan on Oct 4, 2008 14:21:54 GMT -7
I think the smallest pulley for magnusun blowers is 9lbs.. and i will only see around 7 here.. so thats where I will have to keep it, which is okay with me.. with good head work and a mean street blower cam I think it will run good, and 9.1 compression sounds a lot better to me as well.. I will PM you about the head work.. see who did it and how much, etc.. thanks
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vetdream
Junior Member
Roasters for the win!
Posts: 77
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Post by vetdream on Oct 8, 2008 1:41:25 GMT -7
I'm glad I read through this entire post just now, I think I'm feeling a lot better about my 'slo-vette' Not because of your issues Nate but I'm feeling better knowing that when my car showed 390 rwhp that it was corrected to sea level. So when I hit the track and ran a 14.1 @ 107 I was doing it with less than 390 rwhp... Oh crap, what am I saying, that's still horrible LOL Ok, back to your car, I think your dyno graph looks exactly like it should for the power adders that you're using. If you're looking for a quicker ET... then get the traction issues sorted with tires made for the track. And if you're not worried about the ET's as much as you are just plain baffled how a 'stocker' LS2 beats your blown LS2... then I'm with you! And I'll add to the confusion by asking how in the world could I run a 14.03 @ 106 when I was putting down 300 rwhp 'before getting tuned' and then run a 14.1 @ 107 with 390 rwhp 'after getting tuned' I think the Utah air doesn't like to be compressed
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