[PassionRE]

As a few of you may be aware ,of my great friend Gary Bilby of TST Engine Software an I have been working on a new inframe drag pipe for some time now. Gary and I are much alike in that we feel there is always more power to be had regardless of how pleased we are with results of our current set-ups. Honestly , we are diabolically driven by it. So driven, that Gary wrote his own pipe software just to develop this particular project.

Some might say that pipe design is not Rocket Science, but it might as well be. It takes 4 minutes for a modern PC processor just to simulate a 1 second real time event...that’s a ton of data. Were all about data. If the data doesn’t support it, it wont happen...period.

Goal: create the hardest hitting, max tq. and HP inframes for the CP Industries Cheetah Cub. These cylinders in stock form are by no doubt the most mathematically correct designs on the market. They have great potential for additional HP as well with extra porting and mods. All the version of it are similar and predictable when modified. In creating this pipe we needed a correct design to base it on. Good math in, good predictability of our pipe in the design phase.

Not all engines run best with a certain pipe. But choose a category specific engine style in the design process, and the results are much better. Its also easier to tune the pipe for a certain engine type.

Our pipe was designed on the 421 cc Cheetah Cub but will also run well on others as well up to around 600cc. Once we are fully tooled for production, I will place a port mapping guideline on my website for a tool for people to use to calculate a few things before contacting us to see if this pipe might work for them. We also have tunability of the pipe capability in pre-production to custom tune it for your engine based on you port mapping specs you provide based on the guidelines on my website.
It will be offered in our standard form for gas and methanol, along with custom tuned versions discussed above.

Some OEM cylinder porting designs will be able to use it as well. Im quite familiar with most of the major engine builders designs and some of them will fall into the correct engine specification needed for best results. Regardless, the mapping guidelines I will offer will be the last word...its that math thing again, you cant get around it. Real science makes real results.


Our first stampings are finally in and I have a few pics and a dyno run against a very good pipe offered on the market currently. We hope to be in full production be end of summer.

Special attention to physical design was based on input from my customers over the years. GOOD body english, no hitting the frame, head, carbs. You can run the stock air box, it clears the bigger cylinders. It has good plug access, and yes, it even clears a Pingle. Welcome to the new standard. Point em’ out, and take em’ down SNIPER PIPES....Jim Smart PASSION RACING ENGINES

INTRODUCING....SNIPER INFRAMES

http://i57.photobuck...oto0064_001.jpg
http://i57.photobuck...oto0067_001.jpg
http://i57.photobuck...oto0062_001.jpg
http://i57.photobuck...e/Photo0066.jpg
http://i57.photobuck...onre/sniper.jpg



Dyno sheet is 421 CUB on gas, near stock port timing, 180psi, 40 mill Lectrons, VF3's 7 deg advance

This post has been edited by PassionRE: 23 May 2010 - 10:00 PM

[alf44]

Sweet. the chamber looks smaller than most? Similar to the old T4s. You plan on having these in production this summer? Ill try a set on my drag bike build ill be starting soon or on the stock cylinder 4mill I just finished. Any idea on a price? Shoot me a pm. If you need a test dummy Let me no. I planned on running CPI's when funds allow but........a black set of these would look real nice. lol. Hit me up. im very interested in these.

[PassionRE]

alf44, on 23 May 2010 - 10:24 PM, said:

Sweet. the chamber looks smaller than most? Similar to the old T4s. You plan on having these in production this summer? Ill try a set on my drag bike build ill be starting soon or on the stock cylinder 4mill I just finished. Any idea on a price? Shoot me a pm. If you need a test dummy Let me no. I planned on running CPI's when funds allow but........a black set of these would look real nice. lol. Hit me up. im very interested in these.

Alf, they are actually bigger in diameter than even a CPI...only out of the way..heres a different shot....Jim
http://i57.photobuck...o0063_001-1.jpg

[BellicoseBanshee]

Are you looking to do an OOF version in the future?

[PassionRE]

BellicoseBanshee, on 23 May 2010 - 10:44 PM, said:

Are you looking to do an OOF version in the future?

In the works...Jim

[alf44]

Ahh. I see. Well i am interested in talking with you on these. shoot me a pm.

[banshee332]

Great job Jim, You have been talking about it for a year or so now, Im glad you went through with it.
Is my set in the mail yet,lol
shoot me a pm when you get a chance or just give me a call

[camatv]

how could you look at that picture and think its the same size as a t-4??

what do the silencers look like. any idear on pricing? what port numbers are they liking?? i'm looking for a different pipe to try on my next revvv 350 stock cylidner tryout. ?

[KickStartMyHeart]

camatv, on 24 May 2010 - 02:19 AM, said:

how could you look at that picture and think its the same size as a t-4??

what do the silencers look like. any idear on pricing? what port numbers are they liking?? i'm looking for a different pipe to try on my next revvv 350 stock cylidner tryout. ?

Cam, will these pipes feel a lot like the shearers we tried out on saturday or the CPI's I had for a while? You know how much I didnt like those lol!

[jbooker82]

Make an end cap that will hold a dome spark arrestor screen and it would sell really good. None of the Drag pipe MFG's offer any kind of spark arrestor other than those clamp on cobra sparkies. I know a spark arrestor isnt good for power but some places where you would like to put your power on display require them. If you made it easly removeable with 3-4 allen head bolts per side that would be a hit. No more scratched silencers.

Kind of like how the trinity spark arrestors are.

josh

[Fouledout421]

jbooker82, on 24 May 2010 - 08:06 AM, said:

Make an end cap that will hold a dome spark arrestor screen and it would sell really good. None of the Drag pipe MFG's offer any kind of spark arrestor other than those clamp on cobra sparkies. I know a spark arrestor isnt good for power but some places where you would like to put your power on display require them. If you made it easly removeable with 3-4 allen head bolts per side that would be a hit. No more scratched silencers.

Kind of like how the trinity spark arrestors are.

josh

I agree.. a quick change spark arrestor would make things nice! I really like the way the new toomey sparkies are.. just a snap ring.. done..

[Ieat4strokes]

Fouledout421, on 24 May 2010 - 01:33 PM, said:

I agree.. a quick change spark arrestor would make things nice! I really like the way the new toomey sparkies are.. just a snap ring.. done..

+1

[papa_smurf49319]

Look real nice Jim, glad to see ya back on the hq. Let us know some prices and im interested in seeing some silencer pictures also. Also agree with the rest of the guys on a spark arrestor design also!





Cody

[wacko2000]

Hey JIm I would like some more info on these
I sent ya a pm with some questions
thanks

[PassionRE]

Thanks for the input on the silencers. We did the dyno runs using the same set of silencers on each set of pipes. We are going to use circlips with sparky capability. Were trying to cover all the bases...Jim