[Mo]

I saw this used solid roller cam for sale, ya don't see Pontiac blower/turbo cams out there for sale too often. Proposed for a 469, 290 cfm SM heads, 9.6 compression. Single T6 turbo, log headers. E85 port fuel injection. Mostly street and not afraid of a rough idle TH400, 3.23 gears.

Comp Cams 300/312

Duration @ 0.050 264 intake 276 Exh
lobe Lift .4210 .4210

113 ICL

113 LSA

@ 0.050 Intake opens at 19 BTDC
Exhaust opens at 71 BBDC


If not a good for turbo combo is there an "Old Faithful" type cam for turbos out there?

Thanks

[73 TRANSAM]

Pretty big cam for a 462 and I'm sure the overlap is a little bit much too.

[Tom Vaught]

For sure not the right turbo cam for a street car.

Tom V.

[Mo]

Thanks for the info!

[Johnny406]

I have two custom ground HFT boost grinds if you want to go that way.

[Mo]

Appreciate for the offer but I prefer rollers. Thanks

[Mo]

An interesting video about cams and turbos...I think I already have a roller cam I can use

https://www.youtube.com/watch?v=SzXjw3Png3E

[Curtis Slowe]

Originally Posted by Mo

An interesting video about cams and turbos...I think I already have a roller cam I can use

https://www.youtube.com/watch?v=SzXjw3Png3E

I was gonna talk about Holdener but I didn't want to get into the fight. I'm starting to believe the same thing as him. I mean he proves it.
That cam that you're looking at up there is not far from the cam that I had Bullet make for my 505" except mine is pretty much a single pattern cam. I wish now that it was
It was a normal split. I don't even like the cam that is in my 469". I ordered that cam from Cammotion about 5 or 6 years ago I guess. It's a reverse split on a 114. Every test that Holdener did with reverse splits lost power to a normal split, and every test that Holdener and Freiburger did with widening the lsa lost power too. So, as Holdener is showing here any cam that makes more power na will make more boosted. I don't believe I've ever seen a back to back test between a turbo grind cam and any other cam under boost anywhere else.

[Tom Vaught]

I have known Richard Holdener personally since the 2001 Bonneville Event.
A very sharp guy. Nice man and his girlfriend, (now his wife for many years)
is the same. You can take what he says in the videos to the bank.

Tom V.

[Mo]

I agree he makes sense. My take away is get a cam that works well with your N/A combo and add a turbo, make more power. Almost too easy

[Tom Vaught]

You are putting more MASS FLOW thru the engine, (CFM stays the same as the NA engine), Small Turbos and Superchargers have a lower MASS FLOW capability vs a Larger turbo or supercharger and can make more power in some cases.
(If you have screwed up the rest of the engine, you get in some cases less power.)

There are lots of videos out there by Richard where he talks about induction systems, camshafts, cylinder heads, and of course, different sized Turbochargers and their good and not so good points on a HP Power Map. One of the best teachers out there.

Tom V.

[70 bird]

I've watched most of his videos and he has great information. He blows a lot of myths out of the water...... you have to use a reverse split cam. tight lobe separation won't work and the famous long exhaust duration will blow your boost out of the exhaust. I have heard that on this site many times!

[Tom Vaught]

Very few boost guys on the board actually compared to the other venues on the web..

Tom V.

[ErikW]

Call Herb at Luhn Performance. He can set you up with the perfect cam for your project.

[Mo]

I was thinking of going with “old faithful” from SD. It has a good track record with motors similar to my combo n/a. Just add boost to that

[Tom Vaught]

That would work well on a supercharger application.

It might not make the highest HP on a Turbo Engine but should still be just fine for the application specified in Post #1.
If you can find a Old Faithful cam, give it a try.

Tom V.