Rotrex C30-94 supercharger install and modification: pulley choice
#11
Thanks for your experience with E85 !
E85 fuel pumps are rare near my home, but they exist. So a flexfuel tune can be interesting !
I have RC 750 injectors, and Walbro 255 pump: following the first informations I found, this seems to be too small for E85 400bhp tune. It looks like I would have to go ID 1000 at least...
I know your fabulous thread, but had not read it entire. Thanks for the second link for the piping and IC modification, which is quite similair to what I aim to do.
Your car is awesome!
I won't reach that level of perfection, neither that level of power with my C30, but some modifications are interesting
I have 3 options:
- don't touch anything, stay 370bhp
- change IC for a bigger one, upgrade hot piping to 2.5" (even if blower output is only 2"...) and cold piping to 3" => maybe 20bhp to hope ??
- do that AND change injectors fuel pump + add flexfuel E85 sensor and tune => maybe 40-50bhp to hope ??
E85 fuel pumps are rare near my home, but they exist. So a flexfuel tune can be interesting !
I have RC 750 injectors, and Walbro 255 pump: following the first informations I found, this seems to be too small for E85 400bhp tune. It looks like I would have to go ID 1000 at least...
I know your fabulous thread, but had not read it entire. Thanks for the second link for the piping and IC modification, which is quite similair to what I aim to do.
Your car is awesome!
I won't reach that level of perfection, neither that level of power with my C30, but some modifications are interesting
I have 3 options:
- don't touch anything, stay 370bhp
- change IC for a bigger one, upgrade hot piping to 2.5" (even if blower output is only 2"...) and cold piping to 3" => maybe 20bhp to hope ??
- do that AND change injectors fuel pump + add flexfuel E85 sensor and tune => maybe 40-50bhp to hope ??
Now, to answer your questions...
I have 3 options:
- don't touch anything, stay 370bhp (too boring...and no fun! ...don't do this!)
- change IC for a bigger one, upgrade hot piping to 2.5" (even if blower output is only 2"...) and cold piping to 3" => maybe 20bhp to hope ?? (yes, do this! ...but maybe keep original I/C core and re-work the end tanks...more cost effective than buying a new IC) I'd go 2.75" hot side if you can make it fit...be sure to make all bends and radiuses as gradual as possible and smooth.
- do that AND change injectors fuel pump + add flexfuel E85 sensor and tune => maybe 40-50bhp to hope ?? (yes...this too if you are feeling up to it!)
Good luck!
#12
Registered User
Thread Starter
My actual IC is not that big, it's the Supersport version, see dimensions in a previous post.
I can get a brand nwe IC sucah as 500x300x76mm for less than 170$, maybe this is not worth modifying my actual one...
2.75" hot side: isn't it too big ? I mean, the C30 output is only 2"...
Did you feel some "lag" when upgrading bigger piping ?
I can get a brand nwe IC sucah as 500x300x76mm for less than 170$, maybe this is not worth modifying my actual one...
2.75" hot side: isn't it too big ? I mean, the C30 output is only 2"...
Did you feel some "lag" when upgrading bigger piping ?
#13
My actual IC is not that big, it's the Supersport version, see dimensions in a previous post.
I can get a brand nwe IC sucah as 500x300x76mm for less than 170$, maybe this is not worth modifying my actual one...
2.75" hot side: isn't it too big ? I mean, the C30 output is only 2"...
Did you feel some "lag" when upgrading bigger piping ?
I can get a brand nwe IC sucah as 500x300x76mm for less than 170$, maybe this is not worth modifying my actual one...
2.75" hot side: isn't it too big ? I mean, the C30 output is only 2"...
Did you feel some "lag" when upgrading bigger piping ?
Last edited by 06S2k07Si; 11-17-2018 at 06:41 AM.
#14
Make sure you upgrade the fuel pump wiring, if you haven't already done that.
I think the Walbro 255 should support over 400whp on E85 but there are better pumps out there so it might be worth upgrading after all.
I think the Walbro 255 should support over 400whp on E85 but there are better pumps out there so it might be worth upgrading after all.
#15
Registered User
Thread Starter
Some people say it is not necessary to re-wire for the Walbro 255.
It was not re-wired on the S2000 that was equiped with my kit, and it worked fine but only 370bhp ...
It was not re-wired on the S2000 that was equiped with my kit, and it worked fine but only 370bhp ...
#16
Due to the thin factory wiring there will be a noticeable voltage drop at the pump.
Now the Walbro 255 flows ~255l/h at 3bar and 13.5V, but at 12V it only flows ~220l/h.
Sometimes it works and sometimes not
Now the Walbro 255 flows ~255l/h at 3bar and 13.5V, but at 12V it only flows ~220l/h.
Sometimes it works and sometimes not
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pizzai69 (11-18-2018)
#18
Registered User
Thread Starter
Well first you can't just buy any I/C core and expect it to be better than the one you have just because it is bigger...that is only one factor in the equation. It should also have equal to or better flow characteristics. Air flow is one thing that many people don't take the time to investigate, but yet is very important. Since there are many different manufacturers of cores there are also many different core designs and therefore flow characteristics.
I found this seller :
https://fmic.eu/420-fmiceu
The inside of the Core looks like the left photo:
The seller gives bhp indication for each IC. But it still is difficult to know if is flowing better than my actual TTS Supersport one.
#19
I understand that, but it is quite difficult to have good informations about the IC Cores.
I found this seller :
https://fmic.eu/420-fmiceu
The inside of the Core looks like the left photo:
The seller gives bhp indication for each IC. But it still is difficult to know if is flowing better than my actual TTS Supersport one.
I found this seller :
https://fmic.eu/420-fmiceu
The inside of the Core looks like the left photo:
The seller gives bhp indication for each IC. But it still is difficult to know if is flowing better than my actual TTS Supersport one.
There are many core designs such as bar and plate (the ones you showed in your pictures) as well as tube and fin (what the TTS race kit's core is) and perhaps others I'm not aware of. Generally speaking the more fins per square inch the better the cooling but may have less flow...not to mention the design of the fins. Getting these two in balance is key...as well as for the given application. For example in something such as track use where continuous heat is a major concern one may forgo maximum flow for better cooling but in something like drag racing ultimate flow and horsepower may be the biggest concern and the best flow will be the major concern to keep horsepower as high as possible but for a short duration.
In my experience the TTS Race kit's I/C core has proven to flow better than some bar and plate designs. I'm not suggesting that either is better overall but each has its benefits. In a street application like my car, I personally would choose better flow over better cooling due to the fact that most of the time the car does not see high intake air temps.
I hope that this helps.
Brian
Last edited by 06S2k07Si; 11-19-2018 at 08:20 AM.
#20
Registered User
Thread Starter
This sure helps
Note that my acutal TTS Intercooler is "bar and plate" type. (see picture in previous post)
In my case, I want a track proof car, so cooling is important.
I asked directly TTS for advices: they told me that : "For a C30-94 376 hp is quite reasonable. The intercooler is the restriction deliberately to limit power. So going to our Race intercooler would increase power". I am waiting for a quotation on the race IC, as I can't find it on the online shop.
Note that my acutal TTS Intercooler is "bar and plate" type. (see picture in previous post)
In my case, I want a track proof car, so cooling is important.
I asked directly TTS for advices: they told me that : "For a C30-94 376 hp is quite reasonable. The intercooler is the restriction deliberately to limit power. So going to our Race intercooler would increase power". I am waiting for a quotation on the race IC, as I can't find it on the online shop.