Like I said I need some opinions from you guys.

I have a 91 350TPI and I am in the middle of the rebuild. I have the stock plenum(ported), SLP runners(Ported half way down), Accel intake. AFR 190 heads(64cc), SLP 1 3/4 headers, no cats, and flowmaster catback.I am also going to have the NX wet kit on it.

I was thinking about the LPE74211 cam (.211/.219 w.530/.560 lift @112lsa) with 1.6rr. I am trying to have a strong street engine without the nitrous but still have it there when I need it.

Does this cam sound like the duration is to small or should it be fine? I am not trying to move way up in the rpm's or anything, I just dont want to get all of this together and the cam not be up to the job.
Anybody running this cam?

Thanks, Eric

 

I know somebody can help me out here. Nobody has this cam? I already did a search and found a little bit, just not rteally what I was looking for.

 

Thats a really weird cam.. My priliminary guess would be that it is too small duration.. I'd go with a min 224/224 duration.. On the otherhand, the lift is kinda high..

-- Joe

 

I would probably run a little more cam that that with those heads, but without a converter you're going to be limited in what will work very well. Also, what kind of compression ratio are you shooting for.

Just brainstorming the situation out, i'd sell the nitrous kit and scrape together some more money for a vigilante, run pistons to get you into the 10.5:1 compression range, and run something at the minimum like the LT4 hot cam, or even bigger. You'd probably run as fast with a vigilante, compression, and a bigger cam as you would with the milder combo on the bottle.

 

Well, the Vette guys are running solid 12's (anywhere from low to high 12's) w/ the LPE 211/219 cam with long tube runner setups. This cam was also recommended several months ago in a Tech response by Ray Boaz(spelling?) in GM High Tech. I have the LPE 219/219 w/ a SuperRam setup and was pretty happy with the way the car felt and ran, but after G-Teching resently, am I VERY happy with it! Personally, the ONLY cam I would put in with a long tube runner setup would be the LPE 211, but that's just MHO. I think the HOT cam is too big for a long tube runner setup, again, just my opinion.

 

Well this gets back to there's no way i would run LTRs with AFR 190s either. At least not true LTRs. Just no point in choking their potential like that IMHO.

As for hot cam suitability with LTRs, Kevin91Z went 12.8 @ 108.5 with that cam, AL L98 heads and TPIS long tubes. Thats not too bad, especially on those heads, so apparently the LT4 hot cam will work pretty good even on LTRs.

LT4 hot cam, AFR 190s and a siamesed base would lead to a comparison to mike davis's 11.9 in the 100 teens

Seems to me like he's assembling a great collection of parts and i'd hate to see him put it all together only to wish for more cam, etc down the road. The question is how fast is he really trying to go.

Great thing about this post is we can all give our opinions since thats what he's looking for. No matter what cam he picks i'm sure it'll run strong.

I bet we can agree on one thing here though. Without a good converter it won't matter much what cam he runs, he's not going to be able to effectively use the power anyway. And thats why i was saying, buy a vigilante, plan for decent compression, siamese the base and run a cam that can use the AFR 190s to their potential.

 

Hey thanks for given me some pointers but I forgot to mention that I will be running with a t56. Right now I have the 3:23 gears because I am stationed in Germany and I do alot of running on the Autobahn(no speed limit). But I will be back in Texas pretty soon and I hear the war is on between Domestic and Imports.

I was thinking the same thing about the duration of that cam, but I have a book by Lingenfelter and he claims this is one of the best LTR Tpi cams out there. I know, I know, he wouldnt tell us his cam sucks and expect it to sell. Thats why I would like to hear from someone who is running it. I did a search and didnt really come up with much.

I have done some suspension work and I am running some good size tires, I am trying to build a strong street engine but still with some good 1/4 mile times.
Also I am using the SLP runners and they have been opened up a little and I siam. them about three inches down, to open up the breathing better. I would like to do the stock manifold also but I am not that good at it and I think I would get carried away and jack it all up,

But thanks again, and if you have any other suggestions, let me know,
Eric

 

I agree. After switching to a SuperRam and seeing/feeling the results of GofasterFirebird's LTR to LT1 intake swap, I am NOT a fan of the LTR TPI setup.

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As for hot cam suitability with LTRs, Kevin91Z went 12.8 @ 108.5 with that cam, AL L98 heads and TPIS long tubes. Thats not too bad, especially on those heads, so apparently the LT4 hot cam will work pretty good even on LTRs.

Those are certainly very good numbers. All I can relate to is what I have seen. I recently had a run in w/ an LT1 Camaro w/ ported heads, ported LT1 intake, and the HOT cam, among other mods. Our cars were VERY close, there was no clear winner b/c we didn't have much room to race (traffic) and neither pulled from the other. We only raced from about 40mph-80. The owner is a friend of GofasterFirebird's and let him drive the car last week. Gofaster said it had nowhere near the TQ of my car but pulled very hard in the upper rpm's well past 6000rpm. Not the type of cam I would want in a LTR car. Again, my opinion.

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LT4 hot cam, AFR 190s and a siamesed base would lead to a comparison to mike davis's 11.9 in the 100 teens

That car is a freak. Awesome times, especially for the mods. I wish Mike would tune my car. Definitely not what I would call typical results for those mods though. And I have NO experience with a siamesed base, so I can not honestly comment on how that affects the setup except to say it seems to have been great for Mike.

Quote:

Seems to me like he's assembling a great collection of parts and i'd hate to see him put it all together only to wish for more cam, etc down the road. The question is how fast is he really trying to go.

I agree, but if he plans to stick with a LTR setup, I don't want to see him lose the bottom end TQ that those were designed for to try to gain upper rpm HP that he will probably never see with LTR's.

Quote:

Great thing about this post is we can all give our opinions since thats what he's looking for. No matter what cam he picks i'm sure it'll run strong.

I bet we can agree on one thing here though. Without a good converter it won't matter much what cam he runs, he's not going to be able to effectively use the power anyway. And thats why i was saying, buy a vigilante, plan for decent compression, siamese the base and run a cam that can use the AFR 190s to their potential.

I agree. And remember that there is more to a cam than just duration. The LPE 211 has good lift numbers and as explained in the Tech Article in GMHTP magazine, it creates very good cylinder pressure. If I remember correctly, the author of the article said he had used this cam with LTR's and ported Edelbrock heads in many C4 Vettes and they ran low 12's.