Single S366 on a 4.8?
Single S366 on a 4.8? Well, I may have screwed up, not sure. Got a good deal on an S366 and was planning on just running it as a single on a 4.8. GenIV 4.8, 862 heads, one of those new turbo "Pro LS" camshafts from Sum mit, and Th400/PTC converter, swapping in a 3.25 gear. Flipped manifolds, 2" hotside pipes. Turbo is .91AR with divided inlet. E85 for fuel.
I'm shooting for ~650rwhp max and enough to push my car to a 10.0 in the 1/4. Been doing the stickshift/nitrous deal for a while now running 10.70s and need a change with the car.
Thoughts? Will this turbo be too small and choke out the 4.8?
Thanks everyone.
I'm shooting for ~650rwhp max and enough to push my car to a 10.0 in the 1/4. Been doing the stickshift/nitrous deal for a while now running 10.70s and need a change with the car.
Thoughts? Will this turbo be too small and choke out the 4.8?
Thanks everyone.
Last edited by HeavyMetl; Feb 7, 2019 at 06:06 PM.
Not too many guys running the S366's as a single.
I bet it'll make around 600whp on a 4.8 though.
I had an S366 laying around from my old turbo civic and was going to try it on a 5.3, but decided I wanted to make more power than it would support.
A larger turbo that will support more power in the future doesn't cost much more.
Most people always want more power than they originally planned for and it's cheaper to buy things once.
I bet it'll make around 600whp on a 4.8 though.
I had an S366 laying around from my old turbo civic and was going to try it on a 5.3, but decided I wanted to make more power than it would support.
A larger turbo that will support more power in the future doesn't cost much more.
Most people always want more power than they originally planned for and it's cheaper to buy things once.
Backpressure they will all say lol. I get it and what not, but a setup like this would be a lot of fun to drive. I guess I'm too old, but brake boosting and antilag can't beat the feel of actual decent response if you are into driving the thing. I think the s366/4.8 would be pretty damn nice.
Last edited by slowride; Feb 8, 2019 at 10:48 AM.
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I'm fixing to find out. I've got a s366 going on a 4.8 with a blow through carb in a S10. Probable about a week out on putting it on the dyno. It ran good on my 5.3 in the c10 but only had it making about 550 but was a blast to drive. Gonna letter rip on the 4.8 though! Probably won't be my final turbo though cuz I'm gonna need around 700 out of this combo to run the times the s10 needs to run.
I'm fixing to find out. I've got a s366 going on a 4.8 with a blow through carb in a S10. Probable about a week out on putting it on the dyno. It ran good on my 5.3 in the c10 but only had it making about 550 but was a blast to drive. Gonna letter rip on the 4.8 though! Probably won't be my final turbo though cuz I'm gonna need around 700 out of this combo to run the times the s10 needs to run.
Awesome, I hope you can get the blow thru setup dialed in. I wouldn't even know where to start tuning something like that. Sounds like youve got experience with it though.
Update. Just got it going, I guess I don't work too fast these days.
10.79@129.27 tonight, ended up having to swap in a stock 2002 LS1 cam. The Summit Stage 2 just wouldn't build boost on the footbrake with my current converter.
1.64 60', it'll certainly improve I had quite a bit of wheelspin with my old tires. It's crazy responsive on the street, gotta say the single S366/4.8 combo is pretty sweet!
10.79@129.27 tonight, ended up having to swap in a stock 2002 LS1 cam. The Summit Stage 2 just wouldn't build boost on the footbrake with my current converter.
1.64 60', it'll certainly improve I had quite a bit of wheelspin with my old tires. It's crazy responsive on the street, gotta say the single S366/4.8 combo is pretty sweet!
Last edited by HeavyMetl; Oct 10, 2020 at 05:08 PM.
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Sweet little combo. This is the stuff I really enjoy. Nothing crazy about it, just pure fun you can enjoy everyday.
I have often thought that an L20 with a 198/208 L92 VVT cam would be a good candidate for such a build... as I am curisous about using VVT as a way to tune boost. And the L92 cam can be used with 1.85 rockers without the need for a phase limiter to get a mild, but usable, 0.545" valve lift. These are the things that keep me up at night.
Nice build. Thanks for sharing.
I have often thought that an L20 with a 198/208 L92 VVT cam would be a good candidate for such a build... as I am curisous about using VVT as a way to tune boost. And the L92 cam can be used with 1.85 rockers without the need for a phase limiter to get a mild, but usable, 0.545" valve lift. These are the things that keep me up at night.
Nice build. Thanks for sharing.
Sweet little combo. This is the stuff I really enjoy. Nothing crazy about it, just pure fun you can enjoy everyday.
I have often thought that an L20 with a 198/208 L92 VVT cam would be a good candidate for such a build... as I am curisous about using VVT as a way to tune boost. And the L92 cam can be used with 1.85 rockers without the need for a phase limiter to get a mild, but usable, 0.545" valve lift. These are the things that keep me up at night.
Nice build. Thanks for sharing.
I have often thought that an L20 with a 198/208 L92 VVT cam would be a good candidate for such a build... as I am curisous about using VVT as a way to tune boost. And the L92 cam can be used with 1.85 rockers without the need for a phase limiter to get a mild, but usable, 0.545" valve lift. These are the things that keep me up at night.
Nice build. Thanks for sharing.
Andrew
In for above info, also what was the boost level?
Shame the STG2 cam didn't work out for you. Probably would have made up for the lack of low end with another 80-90hp or so on the top end charge. Then run a higher stall converter when you had the funds. Any pics of the setup? whats the hotside look like?
FWIW my mild 4.8 w/ STG2 summit cam would light off the big T6 S480 pretty easily. Race car stuf w/ a trans brake and higher stall converter I know, but it can be done! Much easier with an S366 I'd bet. 2" divided hotside would likely help a ton.
Shame the STG2 cam didn't work out for you. Probably would have made up for the lack of low end with another 80-90hp or so on the top end charge. Then run a higher stall converter when you had the funds. Any pics of the setup? whats the hotside look like?
FWIW my mild 4.8 w/ STG2 summit cam would light off the big T6 S480 pretty easily. Race car stuf w/ a trans brake and higher stall converter I know, but it can be done! Much easier with an S366 I'd bet. 2" divided hotside would likely help a ton.
In for above info, also what was the boost level?
Shame the STG2 cam didn't work out for you. Probably would have made up for the lack of low end with another 80-90hp or so on the top end charge. Then run a higher stall converter when you had the funds. Any pics of the setup? whats the hotside look like?
FWIW my mild 4.8 w/ STG2 summit cam would light off the big T6 S480 pretty easily. Race car stuf w/ a trans brake and higher stall converter I know, but it can be done! Much easier with an S366 I'd bet. 2" divided hotside would likely help a ton.
Shame the STG2 cam didn't work out for you. Probably would have made up for the lack of low end with another 80-90hp or so on the top end charge. Then run a higher stall converter when you had the funds. Any pics of the setup? whats the hotside look like?
FWIW my mild 4.8 w/ STG2 summit cam would light off the big T6 S480 pretty easily. Race car stuf w/ a trans brake and higher stall converter I know, but it can be done! Much easier with an S366 I'd bet. 2" divided hotside would likely help a ton.
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