5.0l 500BHP NA Rover V8 take 3

5.0l 500BHP NA Rover V8 take 3

Author
Discussion

phazed

19,272 posts

164 months

Wednesday 21st March 2018
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Boosted LS1 said:
I had a 5.0 TT with a rebuilt LT77 and it was fine. I never loaded it up to much in 1st or 2nd and if I did it would smoke the tyres. Rear diff was 2.84 with lsd. I loved the whole package. I couldn't find a decent single plate clutch so had to buy a twin plate mcleod which I think may have been a chevy item. It was mounted with the bolts half way into the ring gear. I also had to put a couple of slots into the bell housing to get pressure plate clearance. The pressure plate had 3 levers instead of a dozen fingers. It was a really nice clutch with a light pedal feel.

A friend did a conversion with a 3.08 diff and he wrecked 2 gearboxes but he had no mechanical empathy.
Interesting to hear that your MacLeod twin plate clutch only had three fingers on the pressure plate. Mine has multi fingers and is extremely heavy hence recently fitting a clutch servo.
I would also say that when fitted with my aluminium lightweight flywheel it bolted straight on without any modifications at all.

TarmacRV8

49 posts

33 months

Wednesday 21st March 2018
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Hi wedgeshop,
I have cr mo flywheel, brass button clutch , r380 box i rebuilt as 2 synchros were on way out. Car has only done 35k from new.
The power is with alternator/water pump and wet sump.
No cheating 👍

Boosted LS1

19,469 posts

220 months

Wednesday 21st March 2018
quotequote all
phazed said:
Boosted LS1 said:
I had a 5.0 TT with a rebuilt LT77 and it was fine. I never loaded it up to much in 1st or 2nd and if I did it would smoke the tyres. Rear diff was 2.84 with lsd. I loved the whole package. I couldn't find a decent single plate clutch so had to buy a twin plate mcleod which I think may have been a chevy item. It was mounted with the bolts half way into the ring gear. I also had to put a couple of slots into the bell housing to get pressure plate clearance. The pressure plate had 3 levers instead of a dozen fingers. It was a really nice clutch with a light pedal feel.

A friend did a conversion with a 3.08 diff and he wrecked 2 gearboxes but he had no mechanical empathy.
Interesting to hear that your MacLeod twin plate clutch only had three fingers on the pressure plate. Mine has multi fingers and is extremely heavy hence recently fitting a clutch servo.
I would also say that when fitted with my aluminium lightweight flywheel it bolted straight on without any modifications at all.
It was 20 years ago and I dealt with a guy called Red Roberts at McLeod. He told me to specifically order the pressure plate with 3 levers, I don't know why though. I couldn't source a RV8 package so went with his recommendation. I'm pretty sure it was a 10 1/2" clutch to as I wanted as much friction area as possible. By the time it had been bought, shipped and fitted along with the flywheel mods I reckon it cost at least £1200. It was flipping expensive but was the best clutch I ever had on an Rv8.

TarmacRV8

49 posts

33 months

Wednesday 21st March 2018
quotequote all
Cpl of vids for the sceptics.
One the old 380hp 5lt, one the rebuilt.

Youll note a 11.7 qtr mile split time . Thats for a slippery start up hill, off camber 90 degree right hander and a dipper.

https://youtu.be/-_yBKmfFyYY

rev-erend

20,653 posts

244 months

Wednesday 21st March 2018
quotequote all
thewedgeshop.com said:
What transmission and clutch setup do you guys run when pushing 500bhp?

Running a 3.5lt RV8 Turbo, pushing 350hp 375tq to the wheels. Stock LT77 trans with Centerforce 10in Clutch.

Thinking of building a 5.2lt with same turbo setup, but worried about the trans and clutch.

https://www.thewedgeshop.com/clints-coupe.html
Nice to see you here.

I like the look of your roller rocker cams .. they seem to offer some advantages over my mechanical M256.

rev-erend

20,653 posts

244 months

Wednesday 21st March 2018
quotequote all
Transmitter Man said:
Hi Alan,

My car is in dry secure storage in bucks.

I'm flying back to the UK soon and plan on visiting Topcats a local TVR shop and discuss continuing work on my car. Complete the chassis build, mount the body and install the EPS. That will be affordable I hope until I save up further funds.

You're out that way. Any other shops worth looking at?

I'd also like to hear more from our 500+ bhp friends in this thread.

Phil
420 SEAC
Wish I know of some .. tempted to get someone more local to finish mine..

TarmacRV8

49 posts

33 months

Monday 9th April 2018
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Worked out how to add pics

Boosted LS1

19,469 posts

220 months

Monday 9th April 2018
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^ You thought you had :-)

TarmacRV8

49 posts

33 months

Monday 9th April 2018
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I am downunder 😉

TarmacRV8

49 posts

33 months

Monday 9th April 2018
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I am downunder 😉

TarmacRV8

49 posts

33 months

Monday 9th April 2018
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Lets try again

TarmacRV8

49 posts

33 months

Monday 9th April 2018
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A

rev-erend

20,653 posts

244 months

Monday 9th April 2018
quotequote all
Looks like John Eales cross over manifold.

What ignition system are you running.

Does it run waste spark ?

Reason I ask is I get mixture burning in my inlet at low speeds with my M256 cam and am trying to fix it.

TarmacRV8

49 posts

33 months

Tuesday 10th April 2018
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Hi rev, yes its a jed , ive substantially ported it to match flow and port of ta head and make sure air fuel is mixed and not seoerated at low air speed.
The individual runners and 50mm jenvey are a bit of a bh for start up and idle. But once breathing theyre great.
What spark plug # you running?
Have you checked ports are matched?
Butterfly opening at idle is important too. Have you tried playing around with this. ?
Ive got a basic lucas 3.9v8 dizzy with reluctor, 14cux computer with a haltech sprint 500. Msd blaster 3 coil and bosch module. Bit of a bitza but does the job for now.
The reluctor has sheared off its plastic licator so ive bearing loctited back as a temp fix but am now looking into a new ignition system.

TarmacRV8

49 posts

33 months

Tuesday 10th April 2018
quotequote all
Rev , also is your fuel pressure regulator set right and stays contant through rev range? I run 30psi
Injectors clean?

TarmacRV8

49 posts

33 months

Tuesday 10th April 2018
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Idle timing checked?

TarmacRV8

49 posts

33 months

Tuesday 10th April 2018
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My 245@50 550 odd lift sid roller idles well at 800-900

rev-erend

20,653 posts

244 months

Tuesday 10th April 2018
quotequote all
Plugs are 6 heat range.

Inlut burn you can see in each inlet, so its not down to balance in the 8 x TB's, although I have balanced them with a air meter (snail).

I need to check the base timing again but our next mapping session we are looking at just this issue, so will be changing mixture and fuel to see if it can be overcome.

Emerald is the engine management and all is mappable.

The M256 has a lot of overlap, so I always worry that wasted spark causes an issue at low RPM.

mk1fan

9,885 posts

185 months

Tuesday 10th April 2018
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Looking good.

phazed

19,272 posts

164 months

Tuesday 10th April 2018
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Hi Rev.

Has the M256 more overlap than my H404?