Proper cam gains over stock LS1 at 800+ whp?
10-10-2013, 08:00 PM
#41
no disrespect to any cam spec guys here as im not qualified but I ran a ton of different cams in my turbo buicks everything from a 206/206 to a 241/251 and I know the ls engine is a whole different engine and im just starting to play with boost on mine now . but there was not much return on bigger cams from about 216 on up even with a pt 72 with a .96 housing on a 231 inch engine. after that everything I gained was at a loss in lower end power and spool time. when I was done playing with about 5 or 6 gns the cars were just as fast with a 208/208 and a 63mm turbo as with a pile of cams and a pt -72 . that is why im starting with a 206/212 cam and a tc-78 turbo and a tight convertor on my lq4 nova and see how it runs.jmho.
10-10-2013, 08:08 PM
#42
no disrespect to any cam spec guys here as im not qualified but I ran a ton of different cams in my turbo buicks everything from a 206/206 to a 241/251 and I know the ls engine is a whole different engine and im just starting to play with boost on mine now . but there was not much return on bigger cams from about 216 on up even with a pt 72 with a .96 housing on a 231 inch engine. after that everything I gained was at a loss in lower end power and spool time. when I was done playing with about 5 or 6 gns the cars were just as fast with a 208/208 and a 63mm turbo as with a pile of cams and a pt -72 . that is why im starting with a 206/212 cam and a tc-78 turbo and a tight convertor on my lq4 nova and see how it runs.jmho.
10-10-2013, 08:28 PM
#43
it might be that getting a 3700 lb car moving with a 231"engine needed all the lower end it could get . but the better the cylinder head I had the less cam I needed.and these ls engines have a hell of a lot better head than a buick . it just taught me to start small and move up slow.
10-11-2013, 03:20 AM
#48
I've talked about it over the years and nobody ever seemed to care back then. Lol. There was a 212/112 lsa, a 221/114 lsa, and a 230/114 lsa I tested back to back one summer. The 212, and 221 cam were similar with slight advantage going to the 212 cam, and 230 cam was hard to launch, would nose over on shift if shifted below 6300, and had lowest trap of the 3. This was a 4850 lb 4x4 truck with small turbine. Tc76 maxed out.
10-11-2013, 05:35 AM
#49
The air does slow spool a lot but I had some of the larger cams in Ca as well. I had no problem spooling the larger cams they just didn't come up as quick or pull as hard. The 212 cam ran right at 130 mph at 4850 lbs with a TC76/68, 96. In my nova that would still be 150+ mph with a junk old Tc76/68.
10-11-2013, 06:14 AM
#50
I also did some searching on this website and .found guys running big mph like 138 mph with ets in the high to mid tens telling me they make big power but cant get the car moving . you guys are the pros im just a customer but I do know if it wont come out of the hole it wont et.
mines not running yet so I guess I have no room to talk.thanks
10-11-2013, 06:58 AM
#51
look at it this way a pt-72 is a big turbo for a 231 and I bought right into the big turbo cams make big power in the dyno guys. and gave them a try. but I found out more average power whould outrun big peak power every time.
I also did some searching on this website and .found guys running big mph like 138 mph with ets in the high to mid tens telling me they make big power but cant get the car moving . you guys are the pros im just a customer but I do know if it wont come out of the hole it wont et.
mines not running yet so I guess I have no room to talk.thanks
I also did some searching on this website and .found guys running big mph like 138 mph with ets in the high to mid tens telling me they make big power but cant get the car moving . you guys are the pros im just a customer but I do know if it wont come out of the hole it wont et.
mines not running yet so I guess I have no room to talk.thanks
So you've tested cams. I've tested cams. Stock48 has tested cams.
It seems the ones who can say "been there, done that, got the tshirt" aren't the ones pressing the OP to make a decision and just providing insight from personal experience.
I respect that.
That said, if you've never tested more than 50-100 cams let alone hundreds like I have its hard to make generalizations .
Let alone say one cam is better than another without even testing it back to back.
Opinion>facts
10-11-2013, 07:13 AM
#52
Launching!
iTrader: (1)
Join Date: Nov 2010
Location: Baltimore,MD
Posts: 200
Likes: 0
Received 0 Likes
on
0 Posts
small turbine and big cam here. its all getting switched out. However my powerband wasnt bad at all. it did spool my tiny little 64mm turbine late as ***** cause of the leak I found out about before the turbo but when 15 psi hit it was a ROCKET up until about 6k rpm.
I really like the support from sponsors here on ls1tech. Dr.turbo has explained me alot on turbos through him and FP's website.
Hopefully Martin can acknowledge me for all my questions.
Side question, how do you know if your loose converter is TOO loose for your boost application setup? like when driving and mashing the gas what symptoms give signs for too loose of a stall?
I really like the support from sponsors here on ls1tech. Dr.turbo has explained me alot on turbos through him and FP's website.
Hopefully Martin can acknowledge me for all my questions.
Side question, how do you know if your loose converter is TOO loose for your boost application setup? like when driving and mashing the gas what symptoms give signs for too loose of a stall?
10-11-2013, 07:32 AM
#53
I would have to say the only way you would know is to switch to a tighter stall and/or tighten the one you have now.
Then test it at the track.
That's how it should be done. Not because it worked for someone else so it will work for me type theory.
Where does your car begin to push through the brakes? What rpm did the converter flash to?
Then test it at the track.
That's how it should be done. Not because it worked for someone else so it will work for me type theory.
Where does your car begin to push through the brakes? What rpm did the converter flash to?
10-11-2013, 07:48 AM
#55
Launching!
iTrader: (1)
Join Date: Nov 2010
Location: Baltimore,MD
Posts: 200
Likes: 0
Received 0 Likes
on
0 Posts
I would have to say the only way you would know is to switch to a tighter stall and/or tighten the one you have now.
Then test it at the track.
That's how it should be done. Not because it worked for someone else so it will work for me type theory.
Where does your car begin to push through the brakes? What rpm did the converter flash to?
Then test it at the track.
That's how it should be done. Not because it worked for someone else so it will work for me type theory.
Where does your car begin to push through the brakes? What rpm did the converter flash to?
my 5.3 has a B7m 1900 holeshot. I dont like it.
10-11-2013, 10:47 AM
#56
I feel bad for you man. Jarrett gave you results directly from his 'been there, done that' experience and you were sold something that completely conflicts with that advice. The cam that you were sold is almost the worst I've ever seen for a turbo application...I hope those specifications were a typo. I also hope you're not just trying this cam out because you want the 'been there, done that' t-shirt and feel like you have to pay your dues and run a garbage cam for a while or something. You don't have to fail first to succeed, nor should anyone recommend that to you. Every person who has made a light bulb hasn't tried all ten-thousand of the methods that Edison used and failed...they just went right to the proven stuff and had success. Same goes for cams. Don't run a shitty bumpstick unless you really want to see how useless it is and like doing extra labor and spending extra money.
10-11-2013, 05:51 PM
#60
Do you realize that converter stalling 500 rpms lower or higher can make a world of difference? Do you realize stock48 is talking about smaller engine operating in much thinner air, naturally slowing things like spool up quite a lot? I've read a lot of threads and specs Martin gave me were right in the lower range of what most people suggest, which I find quite satisfying for mostly street car