SP2P intake on an Olds 260
- Thread starter DoubleV
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I know the member who bought mine said it lined up pretty well. Another member on here said it helped low end on his car, went from dangerously slow to acceptable acceleration. The intake sits even a bit lower than a stock intake and has small triangular shaped ports. I can tell you a stock 800 cfm Qjet overwhelmed it. I had it on my 78 1/2 with an Olds 350, had it with an early Olds 307 in the truck as well, part throttle was amazing but full throttle fell on it's face and picked up after a few seconds, hard to explain, not a bog. If I still had mine, I would pull the primary metering Jets and rods out of the dualjet, it would be bang on for the primary, the APT could be adjusted slightly either way from stock and install it in my 800 cfm Qjet. Then limit the secondary air door opening and swap rods till it had the best acceleration. Here is a pic of a SP2P installed on my 350. I wish I still had the intake port pic.
I'm wondering how 'pretty well'. I've never seen a pic let along measure the SP2P's ports. For that matter I've never measured the 260 head ports either but do have a pic of them.
I will see if I have pics of the ports somewhere, I know I took them. If I remember correctly the ports starts near the top of head like the 260 port.
I got lucky, got mine offered to me for $100. There was one last fall on EBay, there have been a few sold over last few years on there.
I got a line on one for $50+ shipping. Figured I could give it a try if I stumble upon a decent Qjet. Not a priority right now but I'd like to know if buying it would even work or not on a 260.
With the peanut ports, stock heads/compression you should just run the factory aluminum A4 4-brl manifold.
Pick up a set of "5A" heads, mill them 0.050" to get 7.86:1 compression. But you'll NEED TO notch the intake side of the bores for valve clearance.
Pick up a set of "5A" heads, mill them 0.050" to get 7.86:1 compression. But you'll NEED TO notch the intake side of the bores for valve clearance.
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