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josh93sc2 06-26-2001 08:31 PM

SPS or JG throttle body?
Hi all,
I want to get a larger bore throttle body and the only real choices I know of (other than doing it myself) are SPS and JG. Does anyone have any opinions as to which are better?

After reading SPS's website and talking to JG, this is what I know:

52 mm bore
They give me a new body, I send them mine

53 mm bore
I send them my body, they return it 3 days later with a larger bore

I'm figuring to go with SPS since:
1) the body will be stronger (thicker bore sides by 1mm), although smaller bore by 1 mm so not as powerful a mod
2) I can keep driving my car until I swap them, rather than be stranded
3) I save ~$80

Am I missing something? Does anyone have any negative experience with either, like the 53 mm bore walls breaking during installation?


newt 06-27-2001 01:02 PM

Hi Josh,
If I'm not mistaken, the JG t.b. is bored all the way through. Big deal, right? Wrong! Since they bored all the way through, they fabricate and install a larger throttle plate. So at wide open throttle, more air is "allowed" to enter the intake manifold. Granted, you're limited by a ton of other things, but if you were to start doing all kinds of other mods, the SPS t.b. would eventually be a bottleneck in the system, where the JG would take you a bit further.

Better yet, go the the Classified section here and sign up for a chris97sc2 t.b. I have the SPS one now, but I'm gonna go for Chris' siince he's planning on the larger throttle plate. On my VW, I have a t.b. that was bored pretty big and has a larger throttle plate and it works great--particularly at higher R.P.M.

Hope this helps,


Mike 06-27-2001 02:33 PM

Check this site out they have a 55MM T/B!

'01SC2&'91SCDragRace 06-28-2001 12:21 PM

Is it straightthrough? I guess it is a modified stock TB.

Mike 06-28-2001 02:35 PM

There is a thread with 40 posts about this T/B on Someone over there already put one on and yes it is 55MM all the way through.

josh93sc2 06-28-2001 10:57 PM

Thanks for the link! At 55 mm wouldn't the t.b. wall be so thin it's likely to crack??

Mike 06-29-2001 03:44 PM

That's why I'm waiting for a few people to try them out first before I buy one. But from what I have seen on the posts it is very well maid and does give more power then the SPS or JG. And the people at Londo are top notch.

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