Hey everyone new member, first car forum account ever with some questions on a teksid turbo build that I am getting started on from the block up. I've been through several forums trying to find answeres but can't seem to find what I'm looking for so hopefully someone can enlighten me or send me in the right direction. With that said, the block displacement is completely stock and will be going in my 03 Cobra along with a Precision 7675 ball bearing turbo. As for what I'm trying to get out of the engine I plan to run a fuel system that allows me to switch between premium (91 octane) and E85 with a fuel cell. On premium I'd like to be around 850hp and on E85 in the 1000hp.
First question I have is what engine compression should I be aiming for? The car won't be an everyday driver but I still want it to be street friendly so I can take it out whenever I want to car meets and events. Please correct me if I have my info mixed, but I recall reading that usually when people turbo their cars they up the compression of their engines. I'm not sure if high compression would be the best option though because I had also read that high compression engines can have idle issues which would be noticable when driven in the streets, on top of which high compression engines also require higher octane fuel which isn't the easiest to get out in California. Another thing I should add though is I do plan on building the engine to max rpms at 9k. Don't know if that would contribute to the compression ratio? So with all off that I'd like to know any recommendations on compression that could meet those specs? 850-1000hp turbo build with 9K max revving running between both 91 octane and E85 street driven.
Second question is parts related, I plan to get forged everything on the internals to support the power I know there's maybe some cast parts that can handle it but I'd rather keep it safe and stick with forged. I have a ModMax forged crankshaft and want to know what style connecting rods I should use? I'd heard Manley makes really strong forged H beams which seem to be very popular in Ford builds but I don't really hear many people running I beams? I'd like a bit more information as to why this is so? I'm interested because I'd also read that I beams are lighter and more essential on a high reving engine to avoid heavy turbulence and throwing out a rod. For now those are my only questions but I'm sure I'll be back with more. I really appreciate your feedback I know there are plenty of knowledgeable builders on here I've lurked within svt forums for 3 years now so I hope you can drop some knowledge on my thread as well!
First question I have is what engine compression should I be aiming for? The car won't be an everyday driver but I still want it to be street friendly so I can take it out whenever I want to car meets and events. Please correct me if I have my info mixed, but I recall reading that usually when people turbo their cars they up the compression of their engines. I'm not sure if high compression would be the best option though because I had also read that high compression engines can have idle issues which would be noticable when driven in the streets, on top of which high compression engines also require higher octane fuel which isn't the easiest to get out in California. Another thing I should add though is I do plan on building the engine to max rpms at 9k. Don't know if that would contribute to the compression ratio? So with all off that I'd like to know any recommendations on compression that could meet those specs? 850-1000hp turbo build with 9K max revving running between both 91 octane and E85 street driven.
Second question is parts related, I plan to get forged everything on the internals to support the power I know there's maybe some cast parts that can handle it but I'd rather keep it safe and stick with forged. I have a ModMax forged crankshaft and want to know what style connecting rods I should use? I'd heard Manley makes really strong forged H beams which seem to be very popular in Ford builds but I don't really hear many people running I beams? I'd like a bit more information as to why this is so? I'm interested because I'd also read that I beams are lighter and more essential on a high reving engine to avoid heavy turbulence and throwing out a rod. For now those are my only questions but I'm sure I'll be back with more. I really appreciate your feedback I know there are plenty of knowledgeable builders on here I've lurked within svt forums for 3 years now so I hope you can drop some knowledge on my thread as well!