hi,

i do need a bit of help. there is an engine:
- 350 stock bottom l-82
- trickflow intake
- 750cfm carb
- stock stall converter (c3 Corvette)
- th350 trans
- elgin cam e-1165-p:


now engine idles around 1000-1100 rpm, in gear it dies if not holding foot on gas pedal, very low vacuum on idle. am i correct that i need bigger stall speed converter to cure this? if yes what stall should i go with? 2000 or more?

best regards

 

Absolutely. Between the 234/244 duration and the tight 106* LSA that thing is NOT going to like idling or pulling against a stock stall coverter. Something around 3000 is where you want to be.

 

The advertised duration for that cam is very low and should work fine with a stock converter but something in the 2300-2800 range would be better.

I would look for a vacuum leak before swapping the converter.

 

Alky- the names they use on the duration specs are misleading. Look at the column labeled "TimedDur". I had to apply a little logic on this one because the naming conventions used are completely out to lunch.

The specs on this cam, near as I can figure, are 234/244* @ .050 (advertised duration of 303/313*, at God knows what measured lift- probably .000-.001"), 106* LSA on a 106* ICL (no advance ground in).

 

Well is advertised duration is in the low 300* range then a torque converter with a minimum of 4000 rpm should be used. A low stall converter will be the cause for the engine stalling at low rpm.

Mismatched converter/camshaft combo.