would this cam work?


1987-later small-block Chevy with OEM hydraulic roller cam / Hyd roller /
RPM range: 1600-5400 / Adv duration: 270 int 276 exh /
Dur at .050: 218 int 224 exh / Lift: .495 int .502 exh /
Lobe separation angle: 110 / Lopey idle

WOULD THIS INTERFERE WITH THE ECM?

 

No, your TBI computer would absolutely hate that cam. Stick to durations in the 20x range, and lift under .460", with a LSA of 112-114, and you'll be fine.

------------------
1991 Camaro Z28
350 L98 w/ T56 (originally 305 LB9 w/ T5)
318 RWHP, 419 RWTQ
12.803 @ 108.50 MPH (1.932 60')
Member: SoCal F-Bodies
ThirdGen 4-Life!

 

is there a comp cams brand cam you would recommend

 

See if you could find a low mileage LT1 cam somewhere on the boards or ebay. Be real cheap and would suit the motor nicely.

 

Comp XR252

 

could you send me summit racings part number or jegs for this cam(summitracing.com)
(jegs.com)

 

It is here in the Comp online catalog: http://www.compcams.com/catalog/058_059.html

XR252HR Part# 08-407-8

I can't find it in either Jeg's or Summit's catalogs. This has a lot of lift so you will need to change your valve springs to use it.

Another excellent roller cam is the one GM uses in their crate 383 engines. It is called the HT 383 cam. Its specs are .431 lift intake and .451 exhaust with an LSA of 112*. The nicest thing is that GM roller cams are less expensive than Comp or Crane cams. It doesn't have quite as much duration as the Comp but is still excellent and won't require new springs, unless your current ones are tired out.

[This message has been edited by Sitting Bull (edited August 05, 2002).]

 

could i use the XR258 or
XR264
XR270

 

The trouble with any of the Comp grinds is their high lift. This necessitates new heavy duty valve springs. When you get even into the territory of the XR252 you are getting pretty borderline with a 305. Most of these roller grinds are meant for a 350, as those extra 45 cubic inches make a lot of difference in how it idles and performs at lower rpms.

The GM HT 383 cam is probably the nicest one of all for a 305. Its lift and duration are just right, and it is less costly, as well.

 

i cant find it but they do advertise a 383 truck cam is that it?

 

Yes, I believe it is a truck crate engine. Phone your local dealership and see how much you can get the cam for. I would guess it is about $180 US.

 

What you have to remember is that with a TBI you need the vacuume even more, the cam you have would work better with a tighter lobe seperation, the more duration at .050 would actually help the poor flowing TBI heads, but either way a custom prom is a must.
Perry