Andy_350GT

Thanks for that. I won't be installing new headers as it's loud enough for me especially being my daily driver. Good to know a bit more gain to the fly as it's an Auto. My timing chain has again started to rattle at tick over now so another issue to resolve. It's really annoying as EVERYTHING in the timing chain case has be renewed with genuine OEM parts (re-did everything only 1k ago) and don't really want to take it all apart a 3rd time! I may try a thicker oil first as currently on Motul 5w30.

That sounds awsome! Would love to hear that engine howling. Sounds expensive, but still awsome

I thought i'd already responded to this on my mobile!? Anyhow, nope no other bottom end replacements apart from the the norm i.e Nippon bearings and pistons oh and Total Seal hi compression rings (i think thats what they were called). So since July last year I was ademant that I had 305hp at the hubs as that was the figure i remembered Mark saying when I left Abbey and obviously the Dyno was done at the hubs... So when i dug out my Dyno printout earlier I was pretty dissapointed and could only assume that Mark ment 305hp at the flywheel! As actual figure at the hubs it seems is 265.6hp And there was me the other day being well chuffed when i stumbbled upon the NA figures on here I also thought that the grand i spent on the cams was well worth it considering the results... Doh! Like you mentioned above, probably an extra 5/10hp can be added now that I have installed HFC's and improved air intake (still have the genuine air box installed but with K&N filer and a Mishimoto direct pipe to the thottle body) so at best its around 275hp at the hubs so not too bad for an Auto I guess but still, this means that i have lost 30hp! I have just slapped myself, feel better already C8 Cams: Yes I did review these but several people mentioned that the idle is pretty rough and lumpy and seeing as it's my daily driver I wanted something that behaved well at all rev ranges as a rough idle would have just annoyed me so hence going for the BC's 264's which are basically a little less agressive than the C8's but better than the JW S7's I think.

Hiya, They are the 264 duration, part number BC0221 if you wanted to look them up. I think it was the maximum I could go without further internal upgrades although I went with upgrading the valve springs from BC (Brian Crower) while I was in there as well. Definitely has good compression and from memory i think it was higher than OEM but i can't remember the figure (done 7.5k since the build). Yes i think 310+ would be about right but Abbey is a long way from me so i won't be visiting them/Mark anytime soon (sorry Mark ) Hamlins engineering in Bridgewater did the re-bore and fitted the new pistons for me while checking all tolerences etc. (I just delivered the block) very happy with thier service i must admit and it shows performance wise gathering what others have achieved from NA set-ups.

Hi All, new to this forum but have been on others over the years. Sorry to restart an old post but wondered if anyone has updated/new info on the bhp figures quoted for NA builds? Mark @Abbey did a revup remap on my 2003 NA DE last year and I was pleased with the results of 305bhp at the hubs but since then i have installed Berks HFC's and a Mishimoto intake to add to the exisitng mods (while also fixing my rattling timing chain) which are: Longlife full custom exhaust Plenum spacer BC Stage 2 cams Racing thermostat 96.00 pistons (0.5 above standard due to rings failing) Cosworth head gaskets Cheers!