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Help Please 25/30 Det

cmitc91

By cmitc91,
in Engines & Forced Induction

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cmitc91 Apprentice

cmitc91

Posted
Posted

Hi Guys,

i am a a newbie to this so please help me out or send me links to where someone else may have asked same questions.

Basically i have a 1993 R33 series 1 skyline manual coupe.

i am in two minds about a couple ideas however i know at the end of the day it depends on cash however 1st of all i want to build a bottom end 1st.

what should i do ??

keep the 25 bottom end and put over sized pistons etc or should i do a 25/30 i think the 30 would be more beneficial for long term and power however there no point wasting money :P

I was looking at spool kits now has anyone had any experience with these guys or any others would hate to out lay the cash if they dont work and need to buy same part again cause they dont fit etc.

as for power i was looking around 350-400kw ish.

Any help that would be great.

Thankyou .

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paul_psi Collaborator

paul_psi

Posted
Posted

I'm doing basically the same thing as you at the moment.

I'm leaving the rb25 that is in my car and just putting heaps of bolt on mods like Etm manifold gt3582 forward facing plenum new process west intercooler 3inch cooler piping microtech lt16c spitfire coils surge tank 044 external pump walbro internal -6 fuel lines ( ill be going -8 soon) and I'm just going to put that on a safe tune so I can drive the car while I built the 25/30

so what iv done is got a 25 head and a vl turbo bottom end ( doesn't have to be a vl turbo can be just a series 2 needs water and oil ports for turbo) first I'm going to do the head so iv ordered a camtech 426B my mechanic had a set of overside valves so I grabbed them and heaviest set of hydraulic valve springs I could taken the head to local machining shop to fit it all and weld up the vct also while its there open up the throught and do some porting work I'm doing all this befor I pick the pistons so we can get an idea of compression before buy them I have a set of rods with 22mm pins from my vl I'm just going to use them

this is were I'm up to at the moment now it's time for the bottom end work out the oil pump get the crank all machined and collar fitted acl bearings get the block bored I'm going to get a asr sump that's baffled and gated

I'm aiming for a safe 400kw all day everyday hope this helps you with your build

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