yay im now the new owner of one used jdm 3sge. Now what to do with it. Remember i have to stay stock for the track. i will be replacing pretty much everything i can as far as timing belt, front seals, rear seal, having the injectors serviced ect. Any more ideas would be full. also i came across an article on gtfours.net about removing/porting the tvis. was wondering if i might see a noticeable gain out of something like this. or if it would do more harm than good. i do have an extra intake manifold now i guess i could experiment. i guess im just wondering if its only really worth it for a gte.

also one other quick question. can anyone think of any reason it would be bad to leave of both the upper and lower timing belt covers. i would like to leave easy access to everything on the front of the motor just in case i loose a water pump or something.

The T-VIS gives a real boost to low down torque in the engine. Compensating for the fact that 16v cars tend to produce less torque than 8v cars and often that torque produced by the 16v engines is high up the rev. The T-VIS works to generate low down pull.
Even on turbo GTE cars it performs a noticeable job. On my mates ST185, when his was not working and fully open the entire time, it was lacking in low end pull. When we fixed it, the difference was felt. I would say he had lost maybe 0.5 - 1 sec off his 0 - 60.

I have a Custom T-VIS spacer.

I believe they are also made to buy, I think from ATS, check in the parts review, Mafix has one.
I am using it as I have a stand alone ECU which in conjunction with my boost controller allows us to map the car and bring the turbo into life lower down.
On a NA 3sge, I would only suggest using it, combined with cams and head work. If you have to remain stock, I would only see its removal as hurting your low down oull from corners etc and off the start.
There have been created in the past electrical gizmos that move the T-VIS opening setting, but I am not sure how you would get one.

Re the cam covers, I have run prev cars without them, but only when trailering the car to and from circuits. I am always worried about stone damage if I go off the circuit and into say a gravel trap with the engine running. I have had to clear out so much crap from my car when getting it wrong, that the thought of trying to clean out an open cam cover is not fun, added to the serious risk of damaging the cam belt etc with a stone trapped inside.
Its personal preference, but for me its not worth the hassle.

alwayz is spot on with the tvis leave as is especially for an NA. if you wanna experience the difference simply disconnect the vacuum lines to the tvis. this will leave the flaps permanantly open.

with the timing cover yer the main problem is shit getting in. It isnt AS much of an issue in FWD cars as being off to the side it isnt in the direct line of fire. having pulled both on and off with the engine still in if you are worried about access. leave the top cover off but the bottom one on. The bottom one isnt to hard to pull on and off where as the top is a down right bitch.

how do you define stock? does the engine have to remain internally standard and you can have things like exh etc? if so other then a nice intake a descent flowing zaust and maybe even some adj cam gears your kind of at the limit

will cam gears make much of a difference without new cams?

yup stock is STOCK! i guess my chances of getting inspected down to pistons is astronomically low. but hey i wanna win fair and square. as for the tvis i kinda figured it would be best to leave it. Would maching up the ports gain me any kinda power? there is a pretty good ridge between the tvis and intake manifolds, and i can only imagine between the tvis and engine. this would keep me stock... gotta keep the airbox but ordered a k&n air and oil filter. the exhaust is kinda questionable with the rules right now. some have upgraded under the guise that the old one was so bad. but mines in good shape so to keep cost down just gonna gut the cat, and i put a cherry bomb in place of the holey muffler i had. actually my car bone stock is one of the fastest cars out there already but while i got it out....just got the injectors back goon put em in now. the ones i got with the jdm motor were varnished shut. glad i got a hair up my ass to have em serviced!

never read about tvis removal but i did forget to connect my tvis vacuum lines once and i noticed a diffrence seemed very sluggish, and about the exhaust are you gona just run a cherry bomb? I have one they are so loud i love that

i would run the intake manifold and tvis stock first. porting those is a long and tedious process that only will gain you 2 or 3 hp.

yeah i think ive decided that im not qualified for that one yet. so im just gonna get the motor together. then ill probably monkey around with the head of the old motor. that way i dont accidentally f up my motor. and i can completly tear down the head to make sure i can clean it really well.

You should also double check your rules to be sure. I run under "Stock means stock" rules too, and it specifically mentions "no porting, polishing, or matching".

nope, i just read them just in case. it does however say "if it doesnt say you can, You cant!" hmm... more food for thought.

It's all about interpretation. I usually go by my rule that if it makes my car more reliable, and/or it's cheaper than the stock toyota part, it's legal.

With what group/sanction body are you going to be running your car? I'm build my car for NASA's Performance Touring, and our rules are never simular, however ours also read the more we do, the higher up the class ladder you'll be placed. I'm shooting for PTE, one class above my base classing, but I may be kidding myself, cause I got lots of mods I want to do!!!

racerb

NASCAR/ charger division. then i think within charger its bombers. and at our home track there called hornets. the nascar rule book doesnt even really have rules for us, its basically moderated by our track. as there are hornets at other tracks that have slightly different rules than ours. its pretty much "gotta be safe. dont upgrade/modify" the best i can really do is get everything to a brand new stock condition, shed as much wieght as possible, and run on some great tires. if you havent raced before id stay shoot as low as possible to start. as i am finding out its f'n expensive. there is always something to fix and tires, ect... if you have upgraded parts that break then you gotta replace with upgraded parts. then again im not sure what your class is like, mine is probably very different than most. very aggresive "rubbing is racin" style. if you see pics of my car, even though my front fenders are all f'd up i wont even replace them. if i put new ones on, then the first race im in theyll get bent into the tire. then i gotta buy another tire. and its not like SCCA where i have to have a "presentable" car.

Yea I raced with SCCA for something like 10 years, but was a Member/Worker/Offical/Series Co-Chair for closer to 23 years, with my last duties were the administrating of the Carolina Cup Pro Series. That last thing is what got me into NASA, the politics of trying to run a pro road racing series within SCCA proved to be a royal pain in the ass, and showed me why NASA is growing so fast!! We have strict rules about body contact and rough , unlike my last few race seasons in SCCA, where I spent about as much time at the body shop as I did prepping for the next race. The biggest difference in car prep is more freedom to do things that were concidered outside the box, where as we concidered many of them as strictly safety improvements. My car will be very close to stock engine and drivetrain wise, with more attention toward safety, handling, and braking. I will make bigger jumps in horsepower and possibly gearing, when I'm sure that I really need more power to be competative.

racerb