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great write up and its nice to see some actual intelligence instead of "hey what'd you put on your car, that would look sweet on my car". This is the first time I've heard someone mention "flowing heads" or vvti cam change out issues. I am a fan of N/A, mainly because i come from the motorcycle industry, but also because i live in CA and need my car to pass emissions tests. And no, I'm not going to do a full turbo kit then try to change it all out in a weekend just to pass my smog check up on monday, then put it all back. Ive seen several people over the years that try it and it never works out. If your married at least.... :) again, great info here i love this crap.
 
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Cherisher
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this thread should be ON FIRE!! just wanted to bump it. after all, it's a Sticky... are people dissatisfied with their N/A performance? a TB, intake, cams, exhaust (from the head back) should be pretty peppy. the more air you can get in and out of the engine is the goal.. no?
 

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I'm gettin ready to do cams and cam gear with the VB upgrade. This will hold me over while I am putting together my turbo kit part by part... Ill throw up some dyno of before and after from stock to "just" cams and -3 cam gear to see/show how much that combo will yield. And me being the most picky person about mods, I will post up my opinions/ feelings as well
 

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what about modifying the quench area by adding metal alloy to the head chamber to raise the compression ratio? for my case it's cheaper to weld/add aluminium than buying custom made high CR pistons, I have most of the ingredients for modified NA power , cams 264, sprocket, +1mm valves, springs, light weight dampened crank pulley (over drive), XS-power side intake plus 1UZ TB, ECU will be unichip piggyback
currently running long headers plus complete exhaust system (2.5 inches) and flea bay intake and light weight pulleys.
most of the head works on the internet involve increasing or polishing the chamber for boost purpose
but not enough info about adding quench!
 

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Just to help people understand what is possible with serious investment you can push a 2JZ-GE to around 280 whp if you throw the kitchen sink at it with mostly bolt-on modifications. My frame of reference is a personal friend from the Supra community who did exactly that with his own NA Supra. He is well known in the Supra world and his IG account is @na_hero if you want to see what he has done. Trust me when I tell you that 99.99% won't be able to go as far as he has, either financially or with regard to the connections he has...so you can pretty safely use his results as a true 100% percentile of what is possible. As far as I know, he does not have a VVTi head, but other than that it's mostly comparable to things that could be done to an IS300. He has personally admitted to me that he has spent several multiples of what it would cost to build a significant boosted setup, but check out his very impressive setup and know that around 280 whp is ALL THE WAY IN, short of using NOS of course.
 
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I think I have heard of him. It is definitely MUCH more expensive to build an all motor car vs boosting it. Not sure why he would other than saying he did it. Props to him.
 

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Hello everyone, I'm obviously new here. I have an 02 is300 I have cat delete headers cat delete exhaust all the way through and I have a cold air intake. I just installed a 10lb bottle of nitrous and am curious if I'm missing any upgrades to my engine? I'd like the car to be faster from zero to 100 before I spray.
 

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Hello everyone, I'm obviously new here. I have an 02 is300 I have cat delete headers cat delete exhaust all the way through and I have a cold air intake. I just installed a 10lb bottle of nitrous and am curious if I'm missing any upgrades to my engine? I'd like the car to be faster from zero to 100 before I spray.
Well that would depend on what you want to do and spend. Try reading a bit before asking such an open ended question.
 

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A shorter rear gear ratio will help 0-60 and a set of drag radials will improve that time as well.
 
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