[c4mo]

Wondering if you anyone could recommend me a cam for my combinantion
-1965 chevelle 3250 w/ driver
-th350 with 4500 stall, will be later switched to pg with brake and delay box
- 12 bolt with spool 5.38 gears
- good year d-5 slicks 31x14x15
-4 in cast crank
-7/16 6.135 rods
-stock ls6 pistons
-990 heads milled to 109cc
-2.19/1.88 valves
-true 10.7.1 compression
- edelbrock victor 2-r intake
- 1050 dominator
- msd 6al - crank trigger
- 2 1/4 headers
I'm interest in a solid roller, brand doesn't matter, in which i will not have to rev over 7200-7300. Its a bracket motor that i do not mind refreshing 1-2 times a season? Thanks for any help, Morgan

 

[aukai]

I like Harold's cams (662)562-4933. I talked to him yesterday I may be getting a new one my self.

 

[sleeper]

Intake lobe 264-270 @.050 Lift .720-.750 with 1.7
Exhaust lobe 268-272@.050 Lift .680-.720 with 1.7
Lobe separation 108 Degree to 104 on intake centerline Closer lobe spread due to lower compression

For a bracket cam somewhere in the 32-36 degree intensity between the seat duration and the .050 duration.

You will most likely run faster with a good 750 hp or a 950 hp.

 

[rustbucket79]

Be a little careful with valve lift, your heads having a big cut like that and the TRW pistons don't have that deep an intake valve relief, or much exhaust valve relief to speak of.

Depending on the lift/duration, over .700" can be iffy.

 

[71454Chevelle]

I talked to him yesterday I may be getting a new one my self.

Mike...............What kind of cam upgrade are you thinking about? Just curious.

 

[bracketchev1221]

Call Chris Straub. 423 854 0007 He can get you what you want and more importantly what you need. My cam was ordered on Monday and was here by Friday.

 

[dacaman12]

IMO, anyone willing to refresh there motor multiple times a year should be running Harold's 28 degree ramps. We've got customers running 2.0 rockers on this family with 285 seat pressure in circle track cars. If your springs last too long, i apologize.

Be a little careful with valve lift, your heads having a big cut like that and the TRW pistons don't have that deep an intake valve relief, or much exhaust valve relief to speak of.

Depending on the lift/duration, over .700" can be iffy.

:noway:

Max lobe lift occurs some 100-110 degrees AFTER TDC. P-2-V is affected by duration and ramp design.:thumbsup:

 

[67Super Sport]

Be a little careful with valve lift, your heads having a big cut like that and the TRW pistons don't have that deep an intake valve relief, or much exhaust valve relief to speak of.

Depending on the lift/duration, over .700" can be iffy.

Any roller like we are talking here with an aggressive ramp on a tight LSA and 240+ duration @.050 may be iffy. Been there done that. I had always dealt with TRW pistons and never could understand why I was always fighting piston to valve clearance issues. When I switched to SRP pistons I learned what a real valve relief was:yes:. Also be sure to check every single valve because the valve seats could be all over the place.

The comp cams XR286R would be a good cam. Be sure to call comp and have them grind it on a billet core though. Do not buy the shelf grind which comes on a cast core. While you're at it have it ground on a 108 or 107 LSA as well.

 

[67Super Sport]

Wondering if you anyone could recommend me a cam for my combinantion

-1965 chevelle 3250 w/ driver

-th350 with 4500 stall, will be later switched to pg with brake and delay box

- 12 bolt with spool 5.38 gears

- good year d-5 slicks 31x14x15

-4 in cast crank

-7/16 6.135 rods

-stock ls6 pistons

-990 heads milled to 109cc

-2.19/1.88 valves

-true 10.7.1 compression

- edelbrock victor 2-r intake

- 1050 dominator

- msd 6al - crank trigger

- 2 1/4 headers

That is going to be WAY too much gear behind a 3 speed, and you are going to need more converter than 4500. More like 5500. If the converter is not built for the combo best you can do is just see what it does.

Its a bracket motor that i do not mind refreshing 1-2 times a season? Thanks for any help, Morgan

No bracket engine should ever have to be freshened 1-2 times per season. The amount of runs an avg. racer puts on an engine should only call for a freshen once every other year.