Basicly, id like to know how much boost differant motors can saftly work under. such as the 89-91 13b TII motor, whats the highest you would want to boost on it, before you think you would blow somthing. also, if anyone knows, how much boost can the N/A motors take, with stock internals. And what can be done so it will take more. thanks for the help. Im planning my new project =)

best wishes,
Mike

 

High boost come with good tuning. A friend ran 20+ psi on a bp s4 with water/methanol injection.

 

well, im talking normal 93 octane gas, A daily driver, with stock internals.

 

Can't stress the previous post by gxlspeeder enough. "High boost comes with good tuning"

Met a young fellow in Reading with a beautiful car, '88 body, S5 engine, 2mm seals, hit 22 lbs. Daily driver, but doesn't run that psi constantly. He actually wants to get it in the 11 second area and still be a dd.

 

well, lets say i have a 90 GXL, With headers, and a forced induction that can hit 20psi. Would it be safe to take that car to the track, and run it at that psi, then just bump it down to like 0-7 for daily driving?

thanks again, best wishes,
Mike

 

Bumpz0rz

 

with normal 93 oct gas water/methanol injection will help prevent against detonation. It'll cool your combustion chambers. But if you want anything about 12-15 psi you'll really want a standalone ecu so you can tune alot more efficiently. The water injection is a good thing in my book, its farely cheap (better than 4-6 dollars a gallon for race gas) you can run it when you want, helps tune.

 

Thanks for your help. I dont any expiriance with water/methanol injection. Is it expensive/difficult? and where does it inject to?

best wishes, mike

 

This will get you black listed by the mods, don't bump within 24 hours of a post. Just a heads up before the mods start screaming at you. LoL.

Also, headers on a turbo?

Now, while it is true that you can run whatever boost you want as long as it's tuned. I would advice staying under 14psi until you know what you're doing. Even at 14 you can still detonate the engine. Just be careful!

 

ahh thanks Parastie, I didnt know that. Sorry mods! And yes, headers lol. I'm going to install a electric supercharger (ESC). Not the crap you hear about all the time(leafblower...ect), its from THOMAS KNIGHT TURBOS. They are not extreamly popular yet because of the bad rep. ESCs have. So id imagine there being some flame in here about it from some. Basicly, what i have to say is, come this summer(im starting to plan the project now) im installing one of these, and well see what it can really do. Its a public forum, everyone can put in there two cents. Thanks all

best wishes,
Mike

 

lol, you got some pics/website of this esc?

 

Yep, sure do. The site is under construction because they came out with a few new models, so its not the greatest at the moment.
http://www.boosthead.com/home.php

Im currently exchanging emails with thw owner now, ill let you know what comes of it.

 

BTW post any questions you have, ive been reading quite abit on this and might be able to answer em, if not i can send them to him via email

 

When Steve Kan was tuning my car, he recommended no more than 17 psi on 93 Octane.

 

Rick from Rick's Rotary reccomended 1.00 bar max...which is a little under 15psi Even when I race my car (rarely) I don't boost over .75 bar roughly 10psi. I have a chart somewhere with the conversions but I'm too lazy to get it.
edt. thats my stock turbo too

 

I have been through the electric supercharger thing with these guys before. Promising idea, poor implimentation.

 

Since we are on the boost question, what kills an engine?

1. the amount of boost?
2. the fact that if its not tuned it could run lean and detonate?

 

i think the second question is the first questions answer

 

High boost will not 'kill' an engine. It will mean greater wear and tear leading to a shorter life.

But running lean due to a bad tune is bad news.

 

keep er 11psi-12psi and under on the street

p.s - the top mount cant handle much more then that

 

so I could run 15 to 20 psi on a stock port engine with a front mount and an upgraded turbo just fine??? Of course I have fuel and ignition mods but I was just wondering if 15 to 20 is safe. Thanks.

 

I would not run 20 psi on pump 93/94. Not sure that gives you much marging for error...15-17 I would say is 'safe'. That is what I was told by Steve Kan. He should know

 

Well, after weighing my options, I think the ESC although very interesting and a cool idea, will cost way more than the car, so theres no point. But, im going to go with a supercharger. Id like to have a TII block if i can. Ill see what i can find. Im going to put on a m90(or similar) supercharger. Im going to make mine with zbrowns idea in mind, but a more 'correct' version. I have 4 differant kinds of welders, and any tools ill need for the job. Im planning on paying under ~$1500 with the price of the car included. Im not looking for maximum performance. Just a daily driver that'll perform better than most newer cars. I will do a dyno before and after the mod. Heres the main things im going to do/install (myself):

M90, Intercooler, TII injecters, headers, 2.5-3'' duals, S-afc, K&N, Boost gauge, adjustable Bov and bypass, retard timing by modding(or using a differant) the dizzy, fab up a mounting bracket.
Ill start working on this now, but wont be ready for the car untill after this school year is done. For those who want a write up, i make up a 'schematic' of the set up. someone will probly make a write up on it soon anyway, just tought id let you guys know in advance, im not going to keep details from ya. ill keep everyone updated as planning progresses. thanks for all your help!!!1one!

best wishes,
Mike

 

BTW, has anyone supercharged their 7 since zbrown? I mean they built the same kind of system as him.

best wishes,
Mike

 

did anyone save, and still have the videos of zbrowns car? i just found that thread a few days ago(read the whole thing) and the links to the vids dont work anymore. if you have them and a minute or two, please send em to Ted.Cooney@gmail.com . thanks a lot.

mike