Info regarding TB's on Superlight R's (k series)
Discussion
Not actually a question from me but a friend from another forum. Here it goes.
"I am looking at a throttle body kit on eBay for the Metro and have a few questions regarding it.
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&am...
A quick google search has shown me that they make 190BHP from a 1.8 K series lump, which is what I intend to put in the Metro but there are various different ones, such as non-vvc equipped and vvc equiped, in the later there are also 143BHP versions and 160BHP versions. I ideally need to know what engine varient it started off as prior to the TB's being added (I know it is a factory thing!) as it looks like a factory ECU to me so may well be locked so the map cannot be altered?
Any info greatly received!"
"I am looking at a throttle body kit on eBay for the Metro and have a few questions regarding it.
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&am...
A quick google search has shown me that they make 190BHP from a 1.8 K series lump, which is what I intend to put in the Metro but there are various different ones, such as non-vvc equipped and vvc equiped, in the later there are also 143BHP versions and 160BHP versions. I ideally need to know what engine varient it started off as prior to the TB's being added (I know it is a factory thing!) as it looks like a factory ECU to me so may well be locked so the map cannot be altered?
Any info greatly received!"
Edited by captain ash on Monday 29th December 23:08
Edited by captain ash on Monday 29th December 23:09
Edited by captain ash on Monday 29th December 23:10
They're off the original K-series SLR. It had nothing to do with the VVC mechanism but it did have a VHPD head.
The ECU is a MEMS and should NOT be considered. The mapping was poor, and anyway you'd need the same spec head/cams/valves for that to be even close to what you're engine needs. Also it uses a MAP sensor built into the ECU (as opposed to being external) which has failed in a few units wth replacement impossible.
The TBs in themselves are useful though. There's no reason why, with a decent aftermarket ECU, you couldn't exceed 200bhp. I got up to about 220bhp with mine until I swapped them for Jenveys.
Using those SLR TBs on a K16 head might be problematic. I am not sure how large the inlet ports can be cut on that head. The VHPD ports were cut rather large, forcing the TBs to be port-matched. So you might find they're too large for a K16 head.
If you have any other specific Q's...
The ECU is a MEMS and should NOT be considered. The mapping was poor, and anyway you'd need the same spec head/cams/valves for that to be even close to what you're engine needs. Also it uses a MAP sensor built into the ECU (as opposed to being external) which has failed in a few units wth replacement impossible.
The TBs in themselves are useful though. There's no reason why, with a decent aftermarket ECU, you couldn't exceed 200bhp. I got up to about 220bhp with mine until I swapped them for Jenveys.
Using those SLR TBs on a K16 head might be problematic. I am not sure how large the inlet ports can be cut on that head. The VHPD ports were cut rather large, forcing the TBs to be port-matched. So you might find they're too large for a K16 head.
If you have any other specific Q's...
As MARS says, its not only the TB's and ECU that are used to make the power.
To make 190-200bhp, you'll need to use over 7k rpm, but the standard 1800 pistons are known to be fragile at this level, so forged pistons will be required.
These TB's can be fitted to a standard K16 head. I assembled an engine with a big valved and ported head, 285M cams and these TB's with an Emerald ECU, that makes a touch over 200bhp.
To make 190-200bhp, you'll need to use over 7k rpm, but the standard 1800 pistons are known to be fragile at this level, so forged pistons will be required.
These TB's can be fitted to a standard K16 head. I assembled an engine with a big valved and ported head, 285M cams and these TB's with an Emerald ECU, that makes a touch over 200bhp.
As noted above, to make even close to that sort of power you will need to spend a lot more money - head, valves, cams, decent ECU, pistons (to be safe), exhaust etc, you may need to look at the loom too. And after all that it may not fit in the engine bay of a Metro without some fettling with a hammer (I have no idea how much space and what clearances you have).
I think a brand new set of Jenvey throttle bodies (which are arguably a better design than these) is circa 545GBP...
I think a brand new set of Jenvey throttle bodies (which are arguably a better design than these) is circa 545GBP...
Gassing Station | Caterham | Top of Page | What's New | My Stuff