tuning for a cam
08-14-2007, 12:46 AM
#1
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tuning for a cam I'll be getting cam soon but i was also planning on getting bigger injectors. If i have a tune setup for stock injectors how hard would it be to adjust it for 42 lb injectors? I'm buying from comp cams because one of my friends can get me his employee discount, can they send a tune for my cam at my elevation?
Also, down the road i plan on getting 4.11's how hard would it be to tune for that?
Thank you for your time.
Also, down the road i plan on getting 4.11's how hard would it be to tune for that?
Thank you for your time.
08-14-2007, 10:49 AM
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the cam will be around 224 but i will be spraying nitrous in it. I maxed out the stock injectors with a 100 dry shot and stock motor. I want to eventually go with 150 shot but i'll need more injector for the cam and the nitrous.
08-14-2007, 12:12 PM
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Originally Posted by RE AND CHERYL
How big a cam are you going with? Unless the cam is huge and your getting heads, you will never need 42lb injectors.
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08-14-2007, 12:12 PM
#5
You will need a custom tune, especially considering the dry shot of nitrous. Many reputable tuners can send you a mail order tune to get you close, but there's nothing like having it tuned on the road and on the dyno.
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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
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
08-14-2007, 02:40 PM
#6
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well with stock internals and 100 dry shot the injectors were 98% maxed out. so i figure i go with 42 lb injectors to have room to grow. For the mail order tunes, who would be the best and what exactly do you need to do? Also can they send a tune with elevation factored in?
08-14-2007, 04:32 PM
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I wouldn't go 150 on a dry shot. Dry shots always go lean for a brief second when you hit it. The more you throw at it, the leaner it goes. I wouldn't bet my engine on the PCM keeping up with the nitrous. Wet may be more expensive, but it's safer.
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08-14-2007, 05:19 PM
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Originally Posted by andypz28
well with stock internals and 100 dry shot the injectors were 98% maxed out. so i figure i go with 42 lb injectors to have room to grow. For the mail order tunes, who would be the best and what exactly do you need to do? Also can they send a tune with elevation factored in?
08-14-2007, 11:49 PM
#11
Wouldnt the SVO 30 lb injectors be better? In the September 2004 issue of GMHIGH TECH it shows Futral and 2 or so others running them in there cars. I think myself I am going to run 30 SVO Ford injectors as soon as I get my FAST 90. I think 42 would be to much. When Ford rated the 30 lb it was with there fuel presure which uis I beleive 35lb to 40lb of fuel presure and with the LS1 run 60lb they would go on up to around 34 to 36lb. Good Luck
Last edited by Evans752; 08-15-2007 at 12:10 AM.
08-15-2007, 02:44 AM
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thanks for all the responses, the trouble is there is no one in town to tune my car the right way. There are a few shops with dynos but i dont trust them on tuning an LS1. So i would have to tow my car 8 hours away to get it tuned right but even then it'll be at a diff elevation.
08-15-2007, 06:57 AM
#13
Originally Posted by RE AND CHERYL
I wouldn't go 150 on a dry shot. Dry shots always go lean for a brief second when you hit it. The more you throw at it, the leaner it goes. I wouldn't bet my engine on the PCM keeping up with the nitrous. Wet may be more expensive, but it's safer.
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IF they are going lean then your nozzle needs to be physically re-aimed at the MAF period. This is basic dry N20 tuning, nothing advanced here...
and the rest of you guys stop telling him that 42s are too big. 42s are easy to tune even if he didn't need an injector that large, not to mention, that if he is spraying 125-150dry and plans on making any furhter engine mods that he NEEDS those sized injectors.....
08-20-2007, 09:26 PM
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Originally Posted by radkon
+1 42 lb are probably too big and yes you can go too big on injectors. Your best bet is to get a true dyno tune and see where your injectors are at. Then use math to figure the best injectors for you.
60lb injectors would not be too big. There is no reason not to go with a large injector. Way too many of my customers go with small "cheaper" injectors just to upgrade later.