4.3 Pre-cat Camshaft

[cavebloke]

Hi,

Does anyone know what the correct spec of camshaft is for a 4.3 Pre-cat and where I can get one? TVR Power sell one camshaft for 4.0, 4.3 and 5.0 which they describe as "885 spec" but I would have expected the pre-cats to have a different cam.

I'm not interested in uprated cams - I just want the correct original profile.

Cheers,

Simon

[cavebloke]

Should it be a Kent 214 as suggested for a 4.3 Chimp in this thread?

[stevesprint]

Here you go, this is the factory cam in my Precat Griffith 430. My engine is standard and produced 269bhp & 285ftlbs torque on the rolling road yesterday plus it doesn't shunt in traffic. So I say stick with the Kent 214 as well!!

[carsy]

Yep, they have a Kent 214 as standard.

Got mine and new vernier pulleys from Tvr Power. Kent wouldnt sell direct to me, i had to go through one of their agents. Power were as cheap as anyone else. Dom did try to persuade me to go with a 218 saying it gave a slightly smoother bottom end. He states he uses the 218 in his 4.3 rebuilds because of this. I stuck with the 214 though.

Edited by carsy on Saturday 12th October 08:29

[Hoover.]

I had a 218 installed with my engine rebuild, looking at an over laid rr graph they pretty much mirror each other through out the rev range in terms of performance..... mines a 4.3 with 282bhp and, 305 torque

[Ant.]

My old Griff has a 218 in it, albeit with a slightly different LCA (I think) at 108 degrees.

Last dyno run for that was 327 brake (4.6ltr) and about 345 lb-ft.

[cavebloke]

Thanks guys. Plucked up the courage to pull mine out today and you're right, it has KC H214 stamped on the end. I'll give Power a ring. It was properly knackered so worried about wear in other places too now.

[carsy]

Ant. said:

My old Griff has a 218 in it, albeit with a slightly different LCA (I think) at 108 degrees.

Last dyno run for that was 327 brake (4.6ltr) and about 345 lb-ft.

That old Griff of yours Ant, sounds like its got about 500hp. Did sound rather impressive when i heard it at Blackpool the other week.

[stevesprint]

Hoover - that’s very impressive, is your engine standard and if so what octane fuel did you use for the test run and also do you know what your ignition advance is/was?
Thanks Steve

[Hoover.]

Steve.... the engine has always been strong and used to give a few people a surprise ie 4.3BV, and some 500's (hence my comment the 500's only really come into play above 125-130mph), only gained 4bhp with rebuild (standard TVR Power re-build) and MA remap.

It was pistons that went on mine,

with regards to advance no idea when rr, now I think it's at max, as opened up plenum to 72mm and about to stick on segam 20AM AFM, and updated chip... won't rr until I get to bottom of cutting out issue, along with feeling really strong one day, and bogged down another (re-wired foot well, and new tune resistor vastly improved - but still not right, on ocassion - suspect broken cable somewhere now).

run with either BP Ultimate or Esso Super ... unsure what was in for RR as it was two years ago (one at growl)

other bits on car are off the shelf bolt bits.... CF trumpets/smooth bore kit - ACT, Plenum spacer - TVR Power - yellow top fuel injectors, not running at their optimum until new bits fitted (see above) when we up the fuel pressure via the chip.

the best power to rate ratio upgrade when driving was me going on a diet and loosing a stone

Edited by Hoover. on Sunday 13th October 14:02

[stevesprint]

Hoover – Thanks. I'm starting to think my standard and never rebuild 4.3 would benefit from a rebuild, super unleaded, a few extra degrees advance and a remap. Was your throttle body bored out to 72mm for the power run???
Thanks again, Steve

P.S. Do you know if your cutting out issue is on the fueling or the spark? Does it always restart immediately, die suddenly or slowly and does the rev count die at the same time?????

Edited by stevesprint on Sunday 13th October 19:15

[Hoover.]

power run was before the throttle body bored out........ when that is done you loose the vacuum advance, and all set to max

with regards to cutting out, occasionally approach junction and revs just drop away .... revs come down slowly but don't stop n just go down to zero ...... no coughing or spluttering... I suspect a broken/damaged cable... never been the same since I launched it Dukes of Hazzard style at 120mph and it came down to earth with a big bang, fked front suspension, broke alternator, guaged sump...

when all up and running properly hoping for mid to high 280's bhp, and raise torque to baot 310-315 ... I can dream .... based on aforementioned mods.