Are the 3/4 SLP headers too much for a 305 TPI(no peanut cam)? Note, I will be adding new heads, manifold and blower in the near future. Until then, I was wondering how the 3/4 headers would effect performance on a stock engine. Thanks.

 

they'll be ok

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86 IROCZ
T-Tops
700R4
305 TPI
3.23 gears
shift kit, manual TC switch, manual fan switch, flowmaster exhaust with edelbrock TES headers& hollow cat, gutted MAF.

 

Do you mean 1 3/4 inch primarys? I had them on my 305TPI for awhile before I switched to the bigger motor. I lost alot of low end torque with them.

 

I think they'd probably be a little bit too big for the 305. The TPI motors do a lot better down low, and the 1 3/4 primaries really kill the low end. You'll still pick up power with the 1 3/4, but I think you'd be happier with a 1 5/8, especially if you do a lot of street driving...

There's my opinion on it...

-Joel Likness

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- 84 Z28 In Progress (Road Racer)
- 85 S10 350/350 (Drag Racer)
- 85 Nissan 200SX Yes, it's Japanese (Circle Track Car)
- 91 Lumina 3.1 Euro (Daily Driver)
Carolina F-Body Club
NC Third Gen Association

 

Actually, you might be ok with them once you add the blower. But, I still think 1 5/8 are plenty, especially if you're doing a lot of street driving with it...

-Joel Likness

------------------
- 84 Z28 In Progress (Road Racer)
- 85 S10 350/350 (Drag Racer)
- 85 Nissan 200SX Yes, it's Japanese (Circle Track Car)
- 91 Lumina 3.1 Euro (Daily Driver)
Carolina F-Body Club
NC Third Gen Association

 

Yeah I agree, I was going to say the same thing.