Newb Questions - 09/04/10 03:25 PM
Hi guys, new to the forum but I have been reading for a while. I recently picked up a 65 Chev C10 with a 250 six banger in it built in may of 65 but came with a 250 not a 230 which makes the truck kinda unique. Currently I'm just in the process of getting the out of province inspection done (Canada) but I'm also planning the engine and suspension upgrades. When I go on the truck forums pretty well all of the rigs have the standard SBC auto tranny combo. If I were to go that route I will just do an LS conversion and be done with it but I keep coming back to turboing the original six. As a result I have a couple of questions.
I'd really like to get in the order of 400 crank HP out of my motor so I'm guessing on a purpose built motor I'd need in the order of 10 lbs boost????? I have a spare Garrett GT2554 lying around that I think would handle 5 lbs efficiently after that it's probably way too small. What turbo or turbo size are most guys running?
Looking at the SPA manifolds they seem to be available in both T3 and T4. If I were to buy a T3 manifold I could use my GT2554 with a T25 to T3 adaptor at low boost initially till I got it set up then switch to a different turbo later. Is the T3 flange too limiting for what I am thinking. Using the T3 I could go up to a GT35 I think as the largest turbo. I suppose I could use a T25 T4 adaptor if that manifold is preferable.
My last question is regarding lag. I plan to use the truck as a daily driver so I don't want to constanly be on the boost but on the other hand I want it there pretty much right now when I need it. How does the 250 respond to being boosted?
Probably enough questions for now. Comments?
Thx M5
Ps This won't be my first turbo experience so all the plumbing etc I already understand.
I'd really like to get in the order of 400 crank HP out of my motor so I'm guessing on a purpose built motor I'd need in the order of 10 lbs boost????? I have a spare Garrett GT2554 lying around that I think would handle 5 lbs efficiently after that it's probably way too small. What turbo or turbo size are most guys running?
Looking at the SPA manifolds they seem to be available in both T3 and T4. If I were to buy a T3 manifold I could use my GT2554 with a T25 to T3 adaptor at low boost initially till I got it set up then switch to a different turbo later. Is the T3 flange too limiting for what I am thinking. Using the T3 I could go up to a GT35 I think as the largest turbo. I suppose I could use a T25 T4 adaptor if that manifold is preferable.
My last question is regarding lag. I plan to use the truck as a daily driver so I don't want to constanly be on the boost but on the other hand I want it there pretty much right now when I need it. How does the 250 respond to being boosted?
Probably enough questions for now. Comments?
Thx M5
Ps This won't be my first turbo experience so all the plumbing etc I already understand.