Caterham sigma 125 supersport upgrade
Discussion
Hi all. New (to me) 2012 caterham 125 sigma owner. I have a couple of initial questions I’ve been puzzling over and would appreciate any help with:
It’s a fixed cam 125- how long do people go between timing belt changes? I read 6 years somewhere? Mainly track day use planned.
140bhp spec: caterham have the supersport cams with a 30% discount (I’m a new member so can’t link to this, but they’re £800 with vat).
What other parts would I need to complete this? Is there a way to get 135 bhp rather than 140? (Magnificent sevens class is up to 135bhp). Has anyone done this recently? What were the all up costs?
What tyres are the caterham academy using this year and where do they get them from?
Thanks
Bill
It’s a fixed cam 125- how long do people go between timing belt changes? I read 6 years somewhere? Mainly track day use planned.
140bhp spec: caterham have the supersport cams with a 30% discount (I’m a new member so can’t link to this, but they’re £800 with vat).
What other parts would I need to complete this? Is there a way to get 135 bhp rather than 140? (Magnificent sevens class is up to 135bhp). Has anyone done this recently? What were the all up costs?
What tyres are the caterham academy using this year and where do they get them from?
Thanks
Bill
Hello Bill,
Are you planning on racing in Mag 7s? If so, we also race what was a 2012 Academy car.
If you’re going to race, I’d start with the Toyo 888r. They aren’t nearly as good as the Avons, while they are at their best for only one weekend, we get a few weekends out of a set.
Engine upgrades are a tricky area. We had the cams, ECU and airbox done to take it up to 142ish BHP by PGM. I’d strongly recommend speaking to Andy Jupp at PGM.
HOWEVER as you’ve spotted 142ish BHP does put you in no-man’s land. The hard judgement call to make is which class will have the most entrants. The class rep can give an opinion.
My call would be to get an entirely new 310r crate engine. I was surprised how inexpensive these are. That would then ensure your car was at the top of the 1600cc classes, and, also help enter the 7-Series and Grads. Though I believe the 270s may have larger grids.
Are you planning on racing in Mag 7s? If so, we also race what was a 2012 Academy car.
If you’re going to race, I’d start with the Toyo 888r. They aren’t nearly as good as the Avons, while they are at their best for only one weekend, we get a few weekends out of a set.
Engine upgrades are a tricky area. We had the cams, ECU and airbox done to take it up to 142ish BHP by PGM. I’d strongly recommend speaking to Andy Jupp at PGM.
HOWEVER as you’ve spotted 142ish BHP does put you in no-man’s land. The hard judgement call to make is which class will have the most entrants. The class rep can give an opinion.
My call would be to get an entirely new 310r crate engine. I was surprised how inexpensive these are. That would then ensure your car was at the top of the 1600cc classes, and, also help enter the 7-Series and Grads. Though I believe the 270s may have larger grids.
Sorry for the late reply: I’m a new forum member and keep getting “wait 24 hours to respond”.
Yes I am looking into racing- I had a look at your suggestion and I think the rules for graduates don’t allow me to use the vvti engine of any spec in my car as it’s not original specification (if anyone knows this to be wrong let me know- it does look like a good idea otherwise). Mag 7’s looks to be ok with it though, I can only find bhp limits.
Yes I am looking into racing- I had a look at your suggestion and I think the rules for graduates don’t allow me to use the vvti engine of any spec in my car as it’s not original specification (if anyone knows this to be wrong let me know- it does look like a good idea otherwise). Mag 7’s looks to be ok with it though, I can only find bhp limits.
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