Curious: cam regrinding a stock 350 LT-5

[Sgreg]

I am interested in knowing if anyone with plenum, inj. housings and head porting mods has made mild modifications to the cams. This assumes a stock 350 cu. in. LT-5. Trying to determine if regrinding can enhance performance of a stock cube, ported motor or cam timing is a better way to proceed.. Jump in if you have experimented with cams without cubic inch changes.

[Polo-1]

that would be Pete

[Pete]

I have seen a gain of 20-25 RWHP
It showed on 2 different dynos and trap speed at 2 tracks.

Before regrinds i was making 440-449 RWHP 400-405 RWTQ (stock cams)
After regrinds i make 469-474 RWHP 395-400 RWTQ

Cam Specs
Intake .236 .425
Exhaust .220 .415

The above HP/TQ #'s are from lowest to highest

Let me also add i did not loose much if any power at low RPM they are withen 5 which i would consider none.
If you come to BG you'll be able to see,hear and feel throttle response on my Z and decide for yourself.
Idles nice at 850 not too cammy and drives like a stocker.

Pete

[ZZZZZR1]

Originally Posted by Pete

I have seen a gain of 20-25 RWHP
It showed on 2 different dynos and trap speed at 2 tracks.

Before regrinds i was making 440-449 RWHP 400-405 RWTQ (stock cams)
After regrinds i make 469-474 RWHP 395-400 RWTQ

Cam Specs
Intake .236 .425
Exhaust .220 .415

The above HP/TQ #'s are from lowest to highest

Let me also add i did not loose much if any power at low RPM they are withen 5 which i would consider none.
If you come to BG you'll be able to see,hear and feel throttle response on my Z and decide for yourself.
Idles nice at 850 not too cammy and drives like a stocker.

Pete

Pete,

You are da man!!!!!!!!!!


David

[Sgreg]

Originally Posted by Pete

I have seen a gain of 20-25 RWHP
It showed on 2 different dynos and trap speed at 2 tracks.

Before regrinds i was making 440-449 RWHP 400-405 RWTQ (stock cams)
After regrinds i make 469-474 RWHP 395-400 RWTQ

Cam Specs
Intake .236 .425
Exhaust .220 .415

The above HP/TQ #'s are from lowest to highest

Let me also add i did not loose much if any power at low RPM they are withen 5 which i would consider none.
If you come to BG you'll be able to see,hear and feel throttle response on my Z and decide for yourself.
Idles nice at 850 not too cammy and drives like a stocker.

Pete

PM sent Pete.

[DREAMZ]

Sounds great and I'll look for Pete at BG. How much are we talking and where is the source? Thanks!

[XfireZ51]

Originally Posted by Pete

I have seen a gain of 20-25 RWHP
It showed on 2 different dynos and trap speed at 2 tracks.

Before regrinds i was making 440-449 RWHP 400-405 RWTQ (stock cams)
After regrinds i make 469-474 RWHP 395-400 RWTQ

Cam Specs
Intake .236 .425
Exhaust .220 .415

The above HP/TQ #'s are from lowest to highest

Let me also add i did not loose much if any power at low RPM they are withen 5 which i would consider none.
If you come to BG you'll be able to see,hear and feel throttle response on my Z and decide for yourself.
Idles nice at 850 not too cammy and drives like a stocker.

Pete

Pete,

Was the original 440hp just your basic top end and head work? Were the stock cams degreed differently than spec?

[Pete]

Originally Posted by XfireZ51

Pete,

Was the original 440hp just your basic top end and head work? Were the stock cams degreed differently than spec?

Yes,ported heads/intake,headers,B&B Xpipe,no cats
440 is same as 449 no change i had it on 2 different dynos and as always second pull makes less then first.

They are from lowest to highest.

Cams were not stock timing.

Pete

P.S.
The people that do the cams are a bit pricey but i know they work if anybody has them done cheaper let me know how they work i'm done with cam R&D it starts to get expansive.
Regrind $300 each

[XfireZ51]

Originally Posted by Pete

Yes,ported heads/intake,headers,B&B Xpipe,no cats
440 is same as 449 no change i had it on 2 different dynos and as always second pull makes less then first.

They are from lowest to highest.

Cams were not stock timing.

Pete

P.S.
The people that do the cams are a bit pricey but i know they work if anybody has them done cheaper let me know how they work i'm done with cam R&D it starts to get expansive.
Regrind $300 each

So should I expect 50rwhp from doing the heads after having ported the top end?

[Paul Workman]

Originally Posted by XfireZ51

So should I expect 50rwhp from doing the heads after having ported the top end?

According to Marc (with whom I've visited and had this conversation with recently) his experience has been similar to Pete's: around 25-30 over top end P&P, headers, exhaust, etc. Marc's "wall paper" shows several examples where a fully ported LT5 w/ headers and low restriction exhaust are putting down around 430 (with an aluminum FW). I suspect the 10 extree hosses of Pete's comes from secret cam timing, written on a coded piece of paper and is hidden in one of those mason jars buried in Pete's back yard, and perhaps the 3" cross pipe and the B&B (which he has mentioned on here in the past).

Who is going to port your heads, Dom? The head porting (as Ryan so often reminds us) begins at the valve seat and works back, as you well know. Just curious if you were going to tackle it, cuz porting is (to me) a fascinating subject and I'd be curious to know what your specs are going to be.

P.