SCCA GT-3 KA24E class question

[S13CoupeLover]

i went to this tunning place called Machine Tune it's over here in CA barely found out about it like 2 weeks ago. after talking with the owner for a while he told me that there's a class in SCCA where they run all KA24Es and so i decided to keep my KA24E and just build it up for DD and also weekend track car. so i looked up the SCCA class it's called GT-3 Nissan class or something like that. and well the thing is they only allow u to use the stock feul injectors and stock throttle body. well after talking with my dad he told me that limit the hp gain you'll have. so i was wondering would there be a way around to get more air and fuel to the engine with out changing the injectors and throttle body? i myself would like to make around 3 to 400 hp but I'm thinking that'll be hard to do with the fuel and air regulated. so what would u suppose i do??

[torquey240]

Y N DA F have i not heard of this wonderful scca class guess im a numb skull, but more to the point you can machine the throttle body to flow more air, butt this will require a new throttle blade( the brass looking circular piece) and injectors can sometimes b rebuilt to flow m0ore fuel good luck bud!!!!!!!

[Fla240sx]

they do use KA24E's in GT3 classes

I believe they are carburated, rebello racing made some, claimed 270crank horsepower

wildly ported head and worked over crank.... big cams.... high compression

sorry theres not to much information availble to my knowledge of the actual builds

I also can't find any pictures of these cars on the internet anymore, although they do exist... I've seen ka24e s13's and s14's.....

port your head, get a header, up your compression, get a big cam, crank pulley, electric fan, test pipe, catback exhaust......... these things will get you the best horsepower results

[Fla240sx]

heres some pics of the cars, I can't find any engine pics, but I've seen them online before

http://www.flickr.com/photos/jbonvouloir/325408806/

[torquey240]

Yay 4 240's there is a hope 4 me yet n professional raceing!!! Thanks much 4 da link very nice indeed hit me up if u come across any new info on the topic

[S13CoupeLover]

they do use KA24E's in GT3 classes

I believe they are carburated, rebello racing made some, claimed 270crank horsepower

wildly ported head and worked over crank.... big cams.... high compression

sorry theres not to much information availble to my knowledge of the actual builds

I also can't find any pictures of these cars on the internet anymore, although they do exist... I've seen ka24e s13's and s14's.....

port your head, get a header, up your compression, get a big cam, crank pulley, electric fan, test pipe, catback exhaust......... these things will get you the best horsepower results

they use the KA24Es that come out factory form the 240s.

and thanx for the advise.

would u happen to know if they have like a stock class or super stock class in the GT-3???

[redtop91]

I remember a thread about a Speedvision NA SOHC where they'd run around 300ish HP. Here's the link: zer...49831

[Fla240sx]

those GT3 cars don't use a stock 240sx engine

I've seen engine bay pics before... BIG 4-1 header

I think they are carb'd or ITB.... with a custom plenum/intake manfiold ducted to the nose.......... pretty cool setup

[boznuttz]

Deep pockets!

[Fla240sx]

[deuce_40]

WOW! i heard you can buy all the parts the use from Nissan ...true?

[torquey240]

Hey man i want more info on this gt3 stuff but can't find much on the scca site, could you point me in the right direction please

[S13CoupeLover]

u go to the scca site and where it says search just type in KA24E and it should pull up GT-3 class that uses the KAE that's what i did and it pulled it up.

[torquey240]

Wow im a dumbazz should've thought of that Thanks man

[distantcrowd]

Nissan has an great catolog that will make you cream your pants!!!the parts were available but now most are no longer produced through nissan directly...

ask for a nismo catolog from a local dealership they have webber carb kits, rebuild kits, high comp pistons, and im pretty sure even ITB setups but the catch is the prices are outragous...

CHECK AVAILABILITY!!!!!!!!!!!!!!!!!

[penpen-commander]

it's not a nismo catalog, it's a nissan motorsports catalog.some stuff are still available, only way to find out is to try doing some reSEARCH.

and those cars with the kae's were converted with a mikuni kit.

this should helphttp://www.courtesyparts.com

and just look at the nissan motorsports section which ishttp://www.courtesyparts.com/nms/index.html

hope this helps.then again, i could be wrong but doubt it.

[boznuttz]

For the OP, if you were to build a similar setup, it certainly would not last as long, it would rape your pocket, you wouldn't be able to daily drive it, and you better believe you'll have some major issues on the street.

If you have several thousand bucks to build the motor alone and just track it...then go ahead. If you need it as a daily driver, then forget about it.

Besides everything mentioned above, you are going to spend quite a bit of cash just tuning it as well. N/A power from a KA24E is FAR from cheap.

[S13CoupeLover]

yeah i was thinking about taking on a track car project but hell man i looked at what they got on them engines and HOLLY F*** man weisco +.40 pistons doing 13.5:1 compression and then NMS intake w/insulators (ported by rebello), Carrillo long rods, ported heads by rebello ETC ETC... first off WAY TO MUCH custom work and second i decided to go with a (TWM) ITB + turbo set up.

the carbs that r on the cars r connected by a product the B.C. something made for nissan motorsports. it's on the web site above ^^ courtesy parts/nissan.

those engines are a work of art by it's self.

[Shift_Kouki]

Was watching some SCCA runoffs this morning on speed....

I noticed 2 or 3 S14's in the field... and then they were showing some guy in the garage / paddock area...

"Hey, thats a pretty sexy KA24DE in that engine bay""Hey, that body work doesn't really look like a 240....""WTF, thats the 350z that finished second! YAY TRUCK MOTOR!!!""Oh snap, S14s in 4th and 5th!!!!!"

How long has this class been hiding? And how long has it been around?

[nismofly]

you can not street a gt3 engine...they dont idle and theyre powerband is like 6-10k rpms

i forget how long they last for but to give you an idea its measured in hours that the engines been run, not miles

the class has been around forever btw....the cars are all tube chassis, about as custom as it gets for production based club racing, you can buy one of those 240s used for like around $40k or so

if you want to race a 240 look into SCCA improved touring or NASA performance touring

[Razi]

Hm, why doesn't the engine idle?Do you just hold down the gas pedal to keep the engine running?

[GT3Nissan]

I finished 4th in GT3 and I run a 200SX, not S14 (of course I have an S13 IT car too, so I keep up with this site). GT3 has been around for many years, and before that is was D production, I believe. Nissans run the KA24E with ITB or stock based fuel injection and 34mm(?) chokes. You can also run the KA24DE like the pole sitter, with any injection/carb, but behind a 33mm Single Inlet restrictor. I run a hybrid L20 without intake restriction an much less weight to try to keep up.

There is no way to run a GT3 motor of any kind on the street. 13.5:1 would be a conservative motor, with SIR restricted motors having much more compression. The engines do idle, it's just lopey and have to be at about 12-1500 rpm for my motor. The KA24E guys run up to about 8000rpm, but have some reliability issues with the valve train. KA24DE guys have more reliability, run to about the same rpm, with the same weight, and seem to be the wave of the future.

The Nissan Motorsports catalog is pretty good for parts, but they don't have everything you need. Rebello is probably the best source for parts. Mine is carbureated but being converted to ITB throttle bodies for next year. 2008 may be the last year for GT3 since we don't have enough competitors running Nationals. It's really too bad since the slower GTL class is too slow for the cost and the faster GT2 class guys spend a fortune on 18x12 wheels and tires.

Steve Spiers

[tboneAl]

I finished 4th in GT3 and I run a 200SX, not S14 (of course I have an S13 IT car too, so I keep up with this site). GT3 has been around for many years, and before that is was D production, I believe. Nissans run the KA24E with ITB or stock based fuel injection and 34mm(?) chokes. You can also run the KA24DE like the pole sitter, with any injection/carb, but behind a 33mm Single Inlet restrictor. I run a hybrid L20 without intake restriction an much less weight to try to keep up.

There is no way to run a GT3 motor of any kind on the street. 13.5:1 would be a conservative motor, with SIR restricted motors having much more compression. The engines do idle, it's just lopey and have to be at about 12-1500 rpm for my motor. The KA24E guys run up to about 8000rpm, but have some reliability issues with the valve train. KA24DE guys have more reliability, run to about the same rpm, with the same weight, and seem to be the wave of the future.

The Nissan Motorsports catalog is pretty good for parts, but they don't have everything you need. Rebello is probably the best source for parts. Mine is carbureated but being converted to ITB throttle bodies for next year. 2008 may be the last year for GT3 since we don't have enough competitors running Nationals. It's really too bad since the slower GTL class is too slow for the cost and the faster GT2 class guys spend a fortune on 18x12 wheels and tires.

Steve Spiers

Hi Steve,
I have been desperately searching for a little direction on this subject and any info at all would be greatly appreciated. If you could send me your email or something of that nature I have a few questions that maybe you could help me with.
I know it's an old thread and a shot in the dark but I figured it couldn't hurt to ask,
Best,
Alistair South
[email protected]