Author Topic: Catcams 290/275 for n/a 1950cc m42? (Read 3782 times)

Natcho · « **on:** October 05, 2016, 04:10:49 PM »

Hi people.
Just � quick question.
I can get my hand on a later m42 head, so 6mm valve steam, with new catcams 290/275. Double springs and custom solid lifters
Plan is to put it on my m44 block with euro s50b30 pistons.
Do you think that will work ? What diff�rence between the 290/275 cams and for exemple the 298/290
Catcams refer to the first one as rally and cross cams and the second as rally and race.
What would i expect in therm of torque/ power distribution with the 290/275? I would like to keep the engine able to pull reasonnably before 5000 rpm, not fan of engine with all the power at 6000 rpm...
Don't plan to rev more than 7500 too.
Any advice?

Darky · « **Reply #1 on:** October 06, 2016, 10:21:33 PM »

Hi

If that is your plan rpm wise, why use solid lifters? There usually for cars with massive rev limit.
Otherwise there a pain!

So m44 83.5 stroke and 86 mm bore?

Regards Rohan

Natcho · « **Reply #2 on:** October 07, 2016, 12:18:41 AM »

No plan to rev high, Just got my hand on a ported head with home made solid lifters, dual springs and the 290/275 brand new all for the price of the cams alone
For the moment, don't know if i will stay with solid lifters, kinda like the maintenance free hydro lifters... And i don't think that under 7500 rpm and with � 290� cam hydro lifters can't do the job

So yeah 83,5mm stroke X 86mm bore, but not sur if using m44 or m42 crank at the moment, i need to see how things will go tol have a decent CR and enough clearence between valves and pistons with the 12mm/11,5mm lift of new cams

Darky · « **Reply #3 on:** October 07, 2016, 08:21:20 PM »

Hi
For normally aspirated engines the slightly longer stroke but weaker m44 crank would be fine.
M42 crank is stronger but only 81mm stroke!

Natcho · « **Reply #4 on:** October 08, 2016, 02:00:21 AM »

I know that's why my plans are to use it as i want an engine with good torque from under 4k rpm and not one wich need to b� all the time above 5k

Head and cams are bought, next step ks to rebush the m44 conrods to see more about CR mesurements

Darky · « **Reply #5 on:** October 09, 2016, 05:51:50 PM »

Which Pistons are you using?

Natcho · « **Reply #6 on:** October 09, 2016, 11:58:51 PM »

Euro s50b30

Author Topic: Catcams 290/275 for n/a 1950cc m42? (Read 3782 times)

Natcho

Catcams 290/275 for n/a 1950cc m42?

Darky

Re: Catcams 290/275 for n/a 1950cc m42?

Natcho

Re: Catcams 290/275 for n/a 1950cc m42?

Darky

Re: Catcams 290/275 for n/a 1950cc m42?

Natcho

Re: Catcams 290/275 for n/a 1950cc m42?

Darky

Re: Catcams 290/275 for n/a 1950cc m42?

Natcho

Re: Catcams 290/275 for n/a 1950cc m42?