Thread: Upcoming VET engine build

Since he has a pulsar it makes since to use the pulsar block. The pulsar has bigger flywheel bolts, oil cooler, bigger bearings, bigger head studs (he really doesn't have to get the 1/2 inch upgrade) he can get the arp studs from IPP or probably ebay. Now if he had a regular Sentra the VE block would make sense. I used the pulsar block because that's what i've been running since 1998 and i had a spare block. Both will handle the horsepower he's looking to make.

The block I will be building is a spare GTiR block that I have. I will be using the factory

sized GTiR headbolts. I believe she will make close if not over the power I'm hoping to

make.





Chris.

Can you edit your first post with one section of it being your ideas and the section below it being exactly what your going to do?? Im not saying this to be a Di*k in anyway, but this would be great for everyone to see so if they do decide to go a certain route then the answers are right in front of you.

Why cant you do 12.5mm pistons? Is it because your using the GTI-R bottom end? Is it because you would be limiting your higher hp goals even though you will make it there with less boost? Or c16 in the tank just costs too much? etc etc..

I feel you can do what you want to do.. Just saying you talked to mazworkx and they said it "cant be done" doesnt make any sense either. WHY? It might not make sense or have the best results OR it just might have the greatest results yet idk.

And this whole VE bottom end doesnt have enough strength to handle 650whp? IDK what your trying to say?? Are you saying stock for stock? IF thats the case ofcourse because of obvious reasons, but if your building either one or the other they will handle it..

Im just trying to get what your saying thats all. This thread is starting to sound like a girl trying to pick out her prom dress. No offense at all, I just wanted to see a high comp turbo pulsar gti-r making 500+hp ?!?!!

Good luck with your build. I'll def be watching for updates

Are they going to be custom pistons anyway at 90mm? If so do whatever comp ratio you want, personally I would like to see probably 11:1 or maybe a little more if I were going to run race gas. I think on c16 you could probably get away with close to 12.5:1 but you probably will be running on the fringe and it will be an expensive mistake. You would probably need a conservative map, even with the race gas so I think closer to 11:1 would be what I would be looking for.
Drew

any reason you wanted high compression?

you see alot of people running the gt35r or 6262 or simular om medium boost hitting big numbers. without high compression

the compression would limit you in the ammount of psi you would be able to run although running high compression with race gas and medium boost you would see high numbers.

but i dont think that the power numbers would warrent the need for the high compression as you could use 8-8-1 or 9-5-1 and achieve the same ammount of power

the build seems good, but it almost seems like you are going a round about way to achieve the power levels of others without a big build list

did mazworx tell you WHY you can't run 12.5:1 compression in you turbo build? they tell you no or actually support thier answer. i think they are just giving you false info.

i am currently doing a high comp, big bore, turbo build. it is almost complete, if you want to do a high comp turbo build then do it...honda guys have been running ultra high comp on trubo cars for a LONG time already. there is absolutely nothing wrong with it, it just leaves you less margin for error while tuning. mabey that mazworx dont have very good tuning skills and are afraid to take on the task of a high comp turbo car

Ohh it can be done, lol, which is why I don't know why they would say that. Like I said it will just leave less room for error in tuning. Maybe they think that you would try to say that they should have told you not to if it ends up going boom? That is part of the game of trying new things, sometimes you win and your plan works, other times you win by finding things out and doing it better the next time. It is a win win unless you are on a tight budget which it doesn't seem like to me.

I think mazworx ran low 7's with a high compression big boost setup so i'm sure they have good enough tuning skills. He doesn't need high compression to make 700hp from the setup he's listing. I know people making around 650hp on smaller bore 9.0:1 compression setup with less than 30psi. Only difference is that they are on E85 and SR16ve cams.

Its no good having a really high compression ratio if you have to retard the hell out of it to avoid det. Its all part of the big balancing act when building a highly tuned motor, which is why Chris is going through a few iterative loops to come is final spec. Just my 2 peneth

explain why it is 'no good' to have a high comp turbo set up. there is absolutely nothing wrong with it. yeah there are some 700hp cars that have standard compression ratio's, but when you want to rais the bar you need to be innovative and start something different...my set up will be getting tested very soon and we'll have to wait and see i guess