Volvo Owners Club Forum - View Single Post - 300 With M90, 240 Axle. Has it been done ?

foggyjames · Sep 19th, 2013, 15:54

I've converted a mk1 343 to 360 running gear, but it's not completely trivial. I'd start with a 360 if one was available!

Torque is the issue, so 300bhp achieved via a stock 8v head, a small(ish) turbo and a ton of boost will probably be a problem (over 300lbft torque), while making the engine breathe at high RPM and keeping the boost down will keep the torque down at the same bhp point. That's my plan - hot cam, large(ish) turbo, tubular manifold (exhaust, maybe intake)...but only about 15psi of boost.

Joni was running north of 330bhp on his 360 with a standard drivetrain (aside from a welded diff - my plan is to use an LSD) with no problems, but his car had a 16v head and a large turbo, which would have helped greatly.

cheers

James

Sep 19th, 2013, 15:54	#18
foggyjames 300 Register Keeper Last Online: Yesterday 23:40 Join Date: Dec 2001 Location: Nottingham	I've converted a mk1 343 to 360 running gear, but it's not completely trivial. I'd start with a 360 if one was available! Torque is the issue, so 300bhp achieved via a stock 8v head, a small(ish) turbo and a ton of boost will probably be a problem (over 300lbft torque), while making the engine breathe at high RPM and keeping the boost down will keep the torque down at the same bhp point. That's my plan - hot cam, large(ish) turbo, tubular manifold (exhaust, maybe intake)...but only about 15psi of boost. Joni was running north of 330bhp on his 360 with a standard drivetrain (aside from a welded diff - my plan is to use an LSD) with no problems, but his car had a 16v head and a large turbo, which would have helped greatly. cheers James __________________ VOC 300-series Register Keeper '13 V70 D4 SE Lux '89 740 Turbo Intercooler '88 360 Turbo Intercooler '84 360 GLT '81 343 GLS R-Sport '79 343 DL '70 164