B & C Conversions

[graeme]

PTP170 is a good kit, except it's terrible idle and somewhat poor fuel consumption.

???

Fd gets a load more (50-70?) miles out of a tank than I do. I don't think it's that bad is it?

[GregR]

prob need to drive them back to back mate

[hiscot]

i have approx 175 + and its a huge differance over std
press the throttle at 90 and grin as it takes off
overtake going uphill with revs that climb to 7000 +
with two 100kg + fat blokes in the car it will still accerate the same
mine is a early s1 so has a good power to weight ratio better than a s2 exige if i remember
regarding torque that depends on comp ratio valve duration and how it was mapped i have shed loads more than std and its not further up the rpm either , and thats on a std s2 manifold
the ptp conversion has a very good write up in an old evo mag i have
it states "with 228bhp/ton ( std =168 ton ) you can pretty much blow anything and evertthing into the weeds in fact for the first time i remember you have to back of the throttle in the wet "
however for 1 thou i would start with the cr box and a lighter flywheel
best to decide what you want to end up with first save for it and do it once but beware its addictive and you soon get used to the extra power
the b an c 160 conversions make approx 146 bhp, i have a r/r print out someware
kiwrog is highly recomended as well but if you do port do as robin said and get slightly bigger valves fitted at the same time, i wish i had ( kiwrog helped desighn the vulcan head in the ptp kit )

[Mikie711]

I have the B&C conversion on my Elise with a dyno chart that shows it makes 144.2 bhp engine power corrected (what ever the hell that means ) and 126 ft/lbs torque again corrected. Peak power is at 6600rpm and peak torque is 5500rpm. However, I bought the car with it fitted and having looked at it the kit is a bit heath robison. It runs a standard throttle body so all the money is in the head and exhaust which imho makes it expensive for what it is.

[DDtB]

Robin has done a great job on his car, but has helped out Campbell, DDtB and I get a great power hike for relatively little cash.

shhhhhhh!!!! My car is standard... completely original... no extra power whatsoever.... honest!!!

Greg is clearly confused/drunk/criminally insane....

move along now....

[mac]

Robin has done a great job on his car, but has helped out Campbell, DDtB and I get a great power hike for relatively little cash.

shhhhhhh!!!! My car is standard... completely original... no extra power whatsoever.... honest!!!

Greg is clearly confused/drunk/criminally insane....

move along now....

I now believe you Dave since you couldn't pass me driving Mandy's 118bhp S2 at the AMP3/SLS day

Mac

[robin]

The PTP170 for the S2 is worse than the same for the S1 - I don't know if that's because the C/R box means that when cruising on the motorway you spend more time at higher RPM or whether the tune on the S2 variant ECU is different or what.

I don't have a huge amount of data to go on, but from our experiences on Stelvio a few years back, JD's PTP170 S2 was worst, my PTP165 S1 (C/R box) was in the middle and Tut's N/A Honda S1 was best on fuel consumption and also range per tank in both motorway and attack mode.

Cheers,
Robin

[graeme]

ack

[mac]

The PTP170 for the S2 is worse than the same for the S1 - I don't know if that's because the C/R box means that when cruising on the motorway you spend more time at higher RPM or whether the tune on the S2 variant ECU is different or what.

I don't have a huge amount of data to go on, but from our experiences on Stelvio a few years back, JD's PTP170 S2 was worst, my PTP165 S1 (C/R box) was in the middle and Tut's N/A Honda S1 was best on fuel consumption and also range per tank in both motorway and attack mode.

Cheers,
Robin

Robin,

I didn't really notice a huge drop in MPG on the euro runs I did in the car - perhaps though I wasn't driving "properly".

Mac

[robin]

Or maybe it's because Mac's is the last of the 165 generation while JD's was the first of the 170 generation (different head, different map).

Cheers,
Robin

[H8OAG]

One thing to consider now with any engine mod is the dreaded emissions test

When Paul G and I visited Murrays to pick up "Ring" spares the Mechanics were moaning about a PTP modded Elise that had failed three times even after replacing the race cat with a standard one and sending the ECU pack to make it run leaner!!!
The MOT is due to get stricter when they lower the levels even more

Joy!!

[Chewitt13]

Starting to wonder if i will bother.........

PTP list the 0-60 at about 4.95, standard car is 5.9???

1 second differnence, i'm taking that that is absolutely redlining the car, on sure if i can be arsed.

If i just change the head to a gas flowed one as robin has advised, will that F*Ck the emissions test?


very confused fraction

[mac]

Or maybe it's because Mac's is the last of the 165 generation while JD's was the first of the 170 generation (different head, different map).

Cheers,
Robin

Good call!

(althought technically mine was one of the first of the last 165's )

Mac

[mac]

One thing to consider now with any engine mod is the dreaded emissions test

When Paul G and I visited Murrays to pick up "Ring" spares the Mechanics were moaning about a PTP modded Elise that had failed three times even after replacing the race cat with a standard one and sending the ECU pack to make it run leaner!!!
The MOT is due to get stricter when they lower the levels even more

Joy!!

Good Call No.2 - The early s2 165 kit is a pig to pass emissions - would be way better if they supplied an emerald with the kit instead of the current piggy back situation.

The car's quite nice now that it's back to standard power - proper map. Not sure if we'll go back to the big head until there's a tuneable ECU to go with it.

[GregR]

Roger that on emissions!!