bolton SP turbo's

[kracin]

anyone else run the bolton SP turbos?

i run a sp67gt because i wanted a turbo that had decent spool characteristics for street conditions, but when needed could produce a high enough horsepower to run with a built auto at the track.

just wondering what everyone else is running along with your intercooler piping size and intercooler size.... im on 2.5" piping and wanting to run a 2.5" in and out intercooler 24x3x12... currently my intercooler is massive and so it feels incredibly laggy as well.. but im also considering using a smaller intercooler because i also have a very large FFIM which is probably causing some extra lag issues as well.

just looking for some info on different setups for when i go back to the drawing board. thanks

Ian

 

[figgie]

always size the IC for the application!

As you learned first hand. Bigger is not ALWAYS better. You always design the system (in this case the intake/intercooler) around its primary application. You could run around with a smaller IC and then track time, replace with a bigger IC?

 

[kracin]

well, the intercooler was just to get the car running to ship it. and i just noticed how the incredibly large intercooler was affecting the spool time, but don't want to go so small in the sizing of the intercooler that all of a sudden im losing cooling efficiency for the amount of air flowing through it.

i know for the size of the turbo, 2.5" piping is just about right, but having a matching intercooler with matching inlet outlet sizes to reduce air losing its flow pattern would be ideal anyway.

 

[ma71supraturbo]

I generally go by Precision's crank HP ratings when chosing intercooler core sizes: http://www.precisionturbo.net/Wcb21017455901.htm

Your core (24x12x3) would be suitable for 850chp and has roughly 70% more volume than a suitably sized core (14x12x3 would be just right for an upgraded ct26 with a 500 crank hp rating). If you live in a hot climate a 18x10x3 would provide better cooling at roughly the same HP rating -- just with 7% more volume (a little more lag)

 

[kracin]

I generally go by Precision's crank HP ratings when chosing intercooler core sizes: http://www.precisionturbo.net/Wcb21017455901.htm

Your core (24x12x3) would be suitable for 850chp and has roughly 70% more volume than a suitably sized core (14x12x3 would be just right for an upgraded ct26 with a 500 crank hp rating). If you live in a hot climate a 18x10x3 would provide better cooling at roughly the same HP rating -- just with 7% more volume (a little more lag)

heh sry, the sig lies... i havent updated it in a while, my engine bay is pretty much complete different... new intake, new pipes, new intercooler, new turbo, new ignition.... lol


running a sp67gt, not the upgraded ct-26 60-1. 67gt is a 6776re DBB turbo, .76 ar







oh btw, i checked out those sizing charts.

id feel safer if more testing was done using the actual turbo flow rate as opposed to a certain hp rating.... you can hit any number of horsepower you want, but its a matter of how useable it is, how early on you get that power, and how long you have the power for.


btw, do a little test. it looks like they just took LxWxH for those intercoolers, and whatever number came out, they made that the hp rating after rounding it off..... lol i hope thats not what they were doing.

051-1204 24 12 4.5 1300 24*12*4.5=1296

051-1196 24 12 3.5 1000 24*12*3.5=1008

051-1168 24 6.4 3.5 540 24*6.4*3.5= 537.6

you get the idea though... intercooler sizing wouldnt be an issue for people if this was a real way to find out how much hp it supports. and how well it flows

 

[ma71supraturbo]

oh btw, i checked out those sizing charts.

id feel safer if more testing was done using the actual turbo flow rate as opposed to a certain hp rating.... you can hit any number of horsepower you want, but its a matter of how useable it is, how early on you get that power, and how long you have the power for.


btw, do a little test. it looks like they just took LxWxH for those intercoolers, and whatever number came out, they made that the hp rating after rounding it off..... lol i hope thats not what they were doing.

051-1204 24 12 4.5 1300 24*12*4.5=1296

051-1196 24 12 3.5 1000 24*12*3.5=1008

051-1168 24 6.4 3.5 540 24*6.4*3.5= 537.6

Very interesting -- I checked a few and it seems your LxWxH ~=hp rating seems to be pretty true. Anyway, if you want to see cores listed by CFM rating, check out Bell's intercooler 3" core page:

http://www.bellintercoolers.com/pages/aachart300.html


a 24x12x3 IC would be rated 850hp by precision -- its rated for 1227 CFM @ 1psi pressure drop by bell, and using the rough 1.5CFM/hp conversion, it comes to 820hp...

 

[kracin]

Very interesting -- I checked a few and it seems your LxWxH ~=hp rating seems to be pretty true. Anyway, if you want to see cores listed by CFM rating, check out Bell's intercooler 3" core page:

http://www.bellintercoolers.com/pages/aachart300.html


a 24x12x3 IC would be rated 850hp by precision -- its rated for 1227 CFM @ 1psi pressure drop by bell, and using the rough 1.5CFM/hp conversion, it comes to 820hp...

well, it could very well be a near estimate of what flow capabilities of an intercooler of a certain design, almost how you can size injectors in cc based on the hp goal your looking for.

overall, if im looking for an intercooler thats going to provide me with good spool as well as good cooling, its gonna have to be smaller than normal to compensate for the much larger intake mani unless i can get a good enough spool off the line with a high stall, high enough to keep the boost from launching on the line

 

[frontierguy25]

I think that the IC that you have right now is fine for your setup. You have a bolt on SP67 so It's going to be laggier than a regular 67 with a full T4 setup. I run a 22x10x3 setup for my JT58 Boss turbo it's a much smaller turbo than yours. My setup isn't very laggy at all. Now It's also a Ebay IC and not a PTE. The IC that I've always wanted was the 24x10x3.5 that PTE has or even the 24x8x3.5. Either would be fine for 500rwhp.

But with your 67mm turbo and FFIM I think that you should be fine. I think that maybe some tuning should help??

 

[MRSUPRA]

It feels laggy because the SP67GT is a laggy turbo compared to a CT-26 upgrade.
The SP67 is capable of making 700rwhp. How much power do you plan on making? You should worry about sizing your turbo properly instead of you intercooler.. That will make a much bigger difference in lag.
If you swap out your intercooler for a smaller one and expect to get much less lag, you are going to be very dissapointed.