I didnt know which part this would go in...

What would you have to do to put a 350 in place of the 305 and use the old TPI setup?

 

Mostly it involves swapping the motor... j/k - A 305 is identical to a 350 other than bore size. EVERYTHING else is the same. Cam size/injector size/chip tune will be different, but nothing major for a stock/mild 350. If your 305 is a hyd roller, I hope your 350 is, or you'll be down-grading...

 

Was it 89 when they did the switch?

 

Could you explain thos further? What exactly is a "hyd roller"? What is the other type? And whats the difference?


Just trying to educate myself a bit on engines.

 

You have hydraulic roller cams 1987 and up. Befor that was a flat tappit ( someone clear up if it was mechanical or hydraulic ???)


I recomend a good book "building small blocks on a budget" It's part of the HP books series I believe . It covers alot of the basics . .... I just forget some of it

Hydraulic roller cam . The tapit has a roller on the end to contact the lobe of the camshaft. Instead of just a flat piece of steel or a rounded end . The bearing take some of the friction away and helps to keep things a bit cooler ( fiction= heat) . The tappit is filled with oil ( SOMEONE SAY WHY PLEASE) . All I know is . If yuo have a SOLID roller cam you need to adjust the rockers more to keep the same valve geomatry. So for a street car the hydraulic roller is a fine cam .

 

My friend wants to buy a car and do this swap...thats why Im asking. If it is a rydraulic roller, what can he do to make it perform like or better than (hopefully) a 350? Its a IROC 305 5-speed TPI. THX