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I have a an 08 ls3. I had the Kooks, catted x pipe, slp loud mouth installed. Added the $70 cia with a hole for fresh air. Still stock intake and filter. Went from 88/89 mph 1/8th mile to 93/94 mph. How much of a rwhp gain did I get? Would a Hotcam really give me a real 50hp increase? What did I get in Rwhp with the 5 mph gain? What would be the rwhp. Save me a trip to the dyno with your guesses please!
Thanks.
So you basically got headers and a CAI. Since your car is an A6 I would have to say your RWHP is probably in the 400-410 range, but a lot of that depends on the dyno used. You probably gained a solid 25-30 RWHP as compared to stock.
If you're going to go through the time and expense of putting in a cam there are a lot of better choices out there than the "GM Hot Cam Kit". Even if you go with a milder cam, which you probably should for drivability with an A6, a good 40-50 RWHP gain is possible.
not sure about that cam but went with a stage 2 texas speed cam, stall and ported heads definitely feels like 50 hp hahah unfortunately the dyno broke but im very happy with it.
I have a an 08 ls3. I had the Kooks, catted x pipe, slp loud mouth installed. Added the $70 cia with a hole for fresh air. Still stock intake and filter. Went from 88/89 mph 1/8th mile to 93/94 mph. How much of a rwhp gain did I get? Would a Hotcam really give me a real 50hp increase? What did I get in Rwhp with the 5 mph gain? What would be the rwhp. Save me a trip to the dyno with your guesses please!
Thanks.
too many variables.my LS2 auto car went near 5/10's quicker with hot cam on stock run flats.go to a dyno days at one of the shops.you can often get 2 or 3 pulls on dyno for $50. or so
What kind of times did you run in the 1/8th? I’m running the same mph as you with the same mods ( no cam ) then put a yank pas3400 in it and picked up a honest 1/2 second on street tires.
What kind of times did you run in the 1/8th? I’m running the same mph as you with the same mods ( no cam ) then put a yank pas3400 in it and picked up a honest 1/2 second on street tires.
[QUOTE=DionM;1596613838]Nice times. About a tenth faster than mine was before I put the converter in. I’m debating over cam or nitrous now.[/QUOTE Gmpp ported heads. There sooo cheep $1200 for another 20 hp.
and that will extend your rpm's as well. https://www.corvetteforum.com/forums...1&d=1518908104
What kind of times did you run in the 1/8th? I’m running the same mph as you with the same mods ( no cam ) then put a yank pas3400 in it and picked up a honest 1/2 second on street tires.
How is the street ability? Is it still ok on the Highway and trips?
It still locks up in 6th gear so it’s like stock on the hwy. I love it. I feel like it should have came from factory like this. Much more fun to drive. How else can you pick up a half second for less than $1000.
Some a/t owners report the lope of a cam is an annoyance at low speeds to the point of having to manually downshift the transmission to stop the head jerking.
Some a/t owners report the lope of a cam is an annoyance at low speeds to the point of having to manually downshift the transmission to stop the head jerking.
That's why I might not do a cam at all unless I get lower gears 2.73 or lower and I find one vvt friendly with .550 lift max so I can just slip it in without changing the springs or removing the heads if I don't get heads. I think I'm sold on the converter though. .3 in the 60' and .5 in the 1/4 per many posts. Is there a reason everybody seems to like the Yank. Is there a reason? And which style ss? 3400?
New slips...Warmer weather.
Last edited by handyandy1496; Mar 3, 2018 at 03:27 PM.
That's why I might not do a cam at all unless I get lower gears 2.73 or lower and I find one vvt friendly with .550 lift max so I can just slip it in without changing the springs or removing the heads if I don't get heads. I think I'm sold on the converter though. .3 in the 60' and .5 in the 1/4 per many posts. Is there a reason everybody seems to like the Yank. Is there a reason? And which style ss? 3400?
New slips...Warmer weather.
My understanding is that the LS-3 stock valve springs are good for no more than .530 lift. Getting a new cam this week and am doing a double valve spring/pushrod/lifter trunion upgrade at same time. Don't trust the stock valve train to handle anything more than GM's "hot cam". Even then, I wouldn't take a chance. Engine damage could cost you a lot more when skimping on such.
A lower ratio (taller gear) will exacerbate the problem. And, you really don't want to go any higher than what you have since the engine will run at too high an rpm at highway speeds.
Yeah. Definitely want a convertor with a higher stall. Not sure what stall, may want to check with a mechanic familiar with such.
Mine's a M6 so I don't have to be concerned about drivability, but I did run across the head-jerk comment when checking out what cam I should use. I picked a Brian Tooley Racing Stage 2 cam/kit but that's just me. I wasn't after a radical cam, mainly idle lope and reliability with a little extra guts. I have the NPP exhaust so I think it will sound good with my choice. Not modifying the exhaust, and I'm expecting about 25hp/25tq and that's fine with me. The guy will be dynoing the car after so I'll have some real numbers when I get that data. Will try to remember to post the results on here.
Last edited by RobJoy; Mar 4, 2018 at 08:39 AM.
Reason: addition
Also, in case you're not aware, the valve train can be upgraded without removing the heads, or even the lifter valley cover as I recall. There's a tool that can be pushed thru from the front of the engine that will hold the lifters up and out of the path of the cam when removing/installing, or you can actually buy a piece of dowel (don't remember the diameter) at local home improvement center, but I'd rather use the tool made for this since don't want to have to pull the oilpan because the dowel slipped off the lifters. The guy doing my cam job has that tool. He runs a speed shop and also races an '08 ZO6. I've seen his racing posts on youtube and he turns a 9.24et/145mph so he appears to know what he's doing.
My understanding is that the LS-3 stock valve springs are good for no more than .530 lift. Getting a new cam this week and am doing a double valve spring/pushrod/lifter trunion upgrade at same time. Don't trust the stock valve train to handle anything more than GM's "hot cam". Even then, I wouldn't take a chance. Engine damage could cost you a lot more when skimping on such.
the LS3 springs are rated by GM for .570 lift depending on what year of GM Performance Catalog you look at.the stock LS3 cam is .551 lift on the intake side and you could use those springs on a lot of different cams.have run them for years on hot cam cars with never an issue.lots of cars out there with 200,000 miles on those springs
I'm also replacing the stock damper with an ATI unit since the OEM one can give problems and separate with age/mileage. It's a good time to do it rather than doing it later, saves on a ton of labor cost.
the LS3 springs are rated by GM for .570 lift depending on what year of GM Performance Catalog you look at.the stock LS3 cam is .551 lift on the intake side and you could use those springs on a lot of different cams.have run them for years on hot cam cars with never an issue.lots of cars out there with 200,000 miles on those springs
I just found that data. I was told by someone (don't remember who) that max. was .530 so when I looked and saw that LS-3 lobe was .525 lift on exhaust, I didn't really look at the intake to see what it was (.551). Anyway, I've already bought the valve upgrade items and so I'll use 'em. Actually, the shop is doing my cam job today, picking it up tomorrow.
Real Hp from cam.
