I'm struggling with which cam to go with on my vortec head/TPI build. I was set on an LT4 hotcam and 1.6 roller rockers until I was told it doesn't work well with TPI.
Does someone have experience with cam on this application? I'm building a roller block so wanting a roller cam. I will be buying new springs and roller rockers also after cam is decided on.
Any help would be appreciated, just got a big snow plow check so looking to buy soon before wife goes to Wal-Mart.

Looking for biggest power for my combination without "over camming". Also I will be sending my memcal off to a supporting member to be reprogrammed.

Thanks

 

LT4 hot cam

 

I was going with the lt4 hotcam until I got some bad feedback when matched up with the TPI. I'm really really close to deciding once and for all on the comp cams 08-502-8 suggested on my build thread in the general engine section.

I hate having 2 threads going on kind of the same thing. What your thoughts on the milder selection?

 

that's a great cam lunati has a voodo that's real close to that grind.
Alittle more lift http://www.summitracing.com/parts/lun-20080721

 

Unless you are doing some machining on the Vortecs, it's best to stay below .470 lift. The stock LT1 cam works well with the TPI, and with the ECM. If you have the heads modified, or get special spring retainers and locks, you can go up in lift to about .550.

 

Voodo cam and stealth ram intake just ordered from summit and on the way!

 

Good job money bags lol

 

?
What would you recommend for a 355 with ported vette heads dynodons first fuel tpi and ram air

 

Christ!

 

Wow really dude!!!!

I am very truly sorry

I was unaware and must have missed the memo, (notice comma) emai, (look theres another) or post

Stating that TGO now requires the actual use of full and proper grammar / punctuation

I will try my best on any and all future post........ But good luck with the rest of the world lol

now back to the topic.......... Do you have any suggestions?

 

it makes it much harder to understand what you are trying to express when you don't use any punctuation. without breaking down your post and over-explaining myself, let me just say that it was confusing to read. fortunately, it was fairly brief. I've seen a couple guys on here that will write LONG posts - with no punctuation, and it just comes off as drunken ramblings.

there is also the element of a certain stereotype that 3rd Gen owners are, by and large, uneducated, unintelligent, trailer park dwelling r3dn3cks. those of us who feel that 3rd Gens and their owners should be more respected in our culture look to see that stereotype broken rather than reinforced whenever possible.

now back to the topic at hand, I find myself in a similar pickle. I currently have an 89 Formula 350 with L98, GMPP aluminum Vortec heads, ZZ4 cam, AS&M large tube TPI runners, Edelbrock Vortec lower intake, plus a lot of other stuff including Dyno Don's 1 3/4" headers, ORYP, and Hooker cat-back, and on and on.

I have been on again-off again about getting a FIRST TPI system. it is my understanding that my car might see significant benefit from the FIRST set up, mainly due to the increased size of the lower intake. i'm thinking that with the increased airflow, I might want to step up to a GMPP Hot Cam. I too have heard negative feedback on Hot Cam w/ TPI - due to the restrictive air flow of TPI. another issue for me would be idle quality. I've heard conflicting stories concerning the idle quality of the Hot Cam. I personally don't think that it could possibly be that bad, but while I want to go fast, I really don't want any kind of lopey idle whatsoever.

*edit* but to answer your question, I THINK that the airflow of a FIRST system vs. a regular TPI would be enough to compensate, and may even be a good match for a Hot Cam. I would stand by for more educated opinions though.

 

lisen to darbysan you go out of your computer range and you will spend a lot of money not to mention a stallconverter or you wont have **** off the line

 

thanks guys

i'm going to stick with the unknown and
run with whatever is already in the engine
then just get it all together and into the car

and yes i know i will need a custom TUNE and
i will most likely end up changing the cam in the end anyways lol

 

A Hotcam is NOT a poor match for a TPI. In fact it works quite well. However I feel the CC305 is a better match. Regardless of the cam you choose YOU WILL NEED TUNING. If its not stock, get ready to tune it for optimal performance. A ZZ4 cam would also work well in a TPI.

I have a Comp 215/220 grind in my Express Van with Etec 170 heads. Stock stall 4L80E with 3.73s, mercruiser marine vortec intake, doug thorley tri-y headers, it runs phenominally well...It will break 255 wide tires loose by simply jabbing the throttle, not bad considering the horrible gearing that lets it run 0-50 mph in 1st gear alone.

The beautiful thing about a computer is the chip settings can be altered to run just about anything. I had a 232/240 cam in the 350 vortec in my old G20 Van. With a 2,800 rpm converter and 3.73 gears it would get up and go.

 

I will tell you from first hand experience that the Hot cam works extremely well with TPI. I had it in my 355ci with stock 083 heads, they were machined for the matching valve springs. I had a ported base with SLP runners and ported plenum. Idle quality, even without a tune was excellent. It pulled hard all the way to 5500. I was very impressed with the sound and performance of the LT4 hot cam. For the money, its hard to beat.

I'm sure there are better grinds out there, but for under $300.00 new from Summit, and being a GM cam... it's a bang for your buck.

 

I used a stock vortec cam with 1:6 roller rockers- worked well.

 

great to hear
thanks