ive heard form a few guys that you need specifc ones for lt1, but ive heard of two separate brand names, so does anyone know which brand is for our cars?

 

I've got the Pro-Gram splayed mains.

 

so are these the only ones that work? which brands work on our blocks?

 

All I can tell you is that the Pro-Gram caps work with my LT1. I'm not saying those are the only ones that work... I never tried any other brand, so I don't know. I can't think of why there would be specific brand limitations on the LT1... except for the complaint a lot of people have about the oil dipstick hitting the cap on some brads/models. Is that what you are worried about?

Might want to do a "search" on Advanced Tech... I think we had someone asking about the dipstick interference on the LT1 recently.

 

yes thats it, they say you cant use the dipstick. ill do a search there thanks.

 

now the question arises, do i need a splayed main cap? will a regular 4 bolt cap work?

 

I saw straight 4-bolt LT1 block make 1,125HP on the engine dyno, and pull a 3,900# 30th SS convert to 9.04@155mph. Then the engine was sold, the block checked and found to be in good condition, currently being used in an 1,100HP nitrous buildup. You just need good studs and caps.

 

Lots of us "old guys" prefer straight caps (and studs) for production blocks and splayed for Bowtie or aftermarket race blocks. I am using the GM pm 3932482 nodular iron cap whioch has 4 parallel bolt holes.

Rich Krause

 

<~~raises hand...... but isn't THAT old.

Parallel-bolt caps here..... and I agree 110% with Rich on that one.

-Mindgame

 

will the straight 4 bolt mains interfere with my dipstick? and which brands would you guys recomend? in hoping for 400rwhp na and a 15-200 shot of nitrous using a progressive controller.

 

ttt