TRS TA Performance Cylinder heads

General Chat About Exhaust, Cylinder Heads, Fuel Systems And Intake

Moderator: phpBB2 - Administrators

mgbloke
Forum Contributor
Forum Contributor
Posts: 523
Joined: Thu May 17, 2007 6:05 pm

Post by mgbloke »

All together I paid 2 separate company's a total of £900 for Mapping
Not Happy



Coops
Site Admin
Site Admin
Posts: 6317
Joined: Fri Nov 17, 2006 7:43 pm
Location: Newbury, Berks
Contact:

Post by Coops »

I had a low end shunt on mine which we could not cure
Dale at Bailey sorted mine out and it drove like a dream after that
Regards Tony C (COOPS)
Image
MS2 V3.57 Ecu mapable efi and wasted spark ignition.
Procharger D1SC supercharger and Cossie RS500 Intercooler @ 14psi of Boost. 416 RWHP, (boost leak)
Forged 4.8 V8 kitted out with the dogs Cajones of parts. :D
Sponsored by: www.v8performanceparts.co.uk, www.interpart.biz, www.caprisport.com & www.baileyperformance.co.uk

Triumph-V8
Newbie
Newbie
Posts: 44
Joined: Fri Nov 06, 2015 7:47 am

Post by Triumph-V8 »

Coops wrote:I had a low end shunt on mine which we could not cure
Dale at Bailey sorted mine out and it drove like a dream after that
I worked on many troubles that look crazy and there seems no remedy.
With no doubt it takes time for fully understanding the complex data
you get from a MS log.

But with no doubt these log informations contain much more data, especially
what makes the MegaSquirt react as it does. So with these informations and
good skill the results must be better than only watching dyno and AFR.

So its very pleasant to fiddle out a nasty problem by yourself and gives
some nice progress in knowledge. It only needs time and patience (and MS).
Cheers
Andreas

User avatar
SimpleSimon
Knows His Stuff
Knows His Stuff
Posts: 620
Joined: Mon Apr 25, 2011 10:36 pm
Location: East Sussex

Post by SimpleSimon »

Low end shunting can often be masked by dialing out ign advance and richening thing up a little on the RV8 running a plenum, when off cam mine only behaves at around 12.5 AFR below 2200rpm so have set the WB closed loop target values at that which works quite nicely, open loop was not an option for me in this zone because when temp conditions changed so did the AFR and hence the lurching I really am on that ragged edge of driveable and bloody horrible and the richer mixture is the only thing that keeps things in check, idle no issues I run that open loop at around 13.5/14 all self inflicted of course I am running a mech 238 cam 8) it does behave better than I expected and is surprisingly punchy midrange but revs likes a mad thing 8-)
TVR Chimaera RV8 Mods & Megasquirt

DaveEFI
Gold Member
Gold Member
Posts: 4603
Joined: Fri Feb 26, 2010 4:27 pm
Location: SW London, UK

Post by DaveEFI »

I'd guess a lot of these problems are due to using Alpha-N rather than Fuel Density?
Dave
London SW
Rover SD1 VDP EFI
MegaSquirt2 V3
EDIS8
Tech Edge 2Y

Triumph-V8
Newbie
Newbie
Posts: 44
Joined: Fri Nov 06, 2015 7:47 am

Post by Triumph-V8 »

Yes, Alpha-n is a pain and should only be used when cam does not
allow speed density.

Around idle the mapping can be made quite fine and fiddeling with
the y-axis is worth to spend a day on it.

I was very astonished that with speed density under full load
some pulsations at some revs spoiled the fuelling.

Seems that MS sees significant manifold pressure and leans mixture.
I had to swap to blended Alpha-n/SpeedDensity because I could not
get rid of that problem.

..... all a good job for the Megalog Viewer.
Cheers
Andreas

User avatar
SimpleSimon
Knows His Stuff
Knows His Stuff
Posts: 620
Joined: Mon Apr 25, 2011 10:36 pm
Location: East Sussex

Post by SimpleSimon »

DaveEFI wrote:I'd guess a lot of these problems are due to using Alpha-N rather than Fuel Density?
I run speed density as I know the benefits and glad my new motor spec just about props this up because my vac signal at low speed is piss poor but I am glad I stuck with it 8) I have an inline filter and smallish Weber fuel jet in the MAP line to keep things smooth and less noisy :o once over 2k its all business as usual, I did give hybrid Alpha N a go but it all seems additive and my fuel map was already there and it felt like I would have to start my VE table from scratch pretty much Alpha N does seem more tolerant to the RV8 using a plenum and big cam at low speed though as in less kangarooing/lurching :wink: I will stick with S/D for now though my tune is pretty good
TVR Chimaera RV8 Mods & Megasquirt

Coops
Site Admin
Site Admin
Posts: 6317
Joined: Fri Nov 17, 2006 7:43 pm
Location: Newbury, Berks
Contact:

Post by Coops »

A long shot I know.
Has anyone using the TA/TRS heads have a template for cutting the valley gasket please before I bugger up my new gasket trying to work it out.
Regards Tony C (COOPS)
Image
MS2 V3.57 Ecu mapable efi and wasted spark ignition.
Procharger D1SC supercharger and Cossie RS500 Intercooler @ 14psi of Boost. 416 RWHP, (boost leak)
Forged 4.8 V8 kitted out with the dogs Cajones of parts. :D
Sponsored by: www.v8performanceparts.co.uk, www.interpart.biz, www.caprisport.com & www.baileyperformance.co.uk

mgbloke
Forum Contributor
Forum Contributor
Posts: 523
Joined: Thu May 17, 2007 6:05 pm

Post by mgbloke »

Mine is off at the moment so could trace round it. Not so much a gasket as an ally cover plate.
Where did you get your heads from?

mark

Coops
Site Admin
Site Admin
Posts: 6317
Joined: Fri Nov 17, 2006 7:43 pm
Location: Newbury, Berks
Contact:

Post by Coops »

That would be great if you could please mate,
mine came direct from TA,
no gasket listed have to cut your own,
so going to use either a tin one or a composite one cut to suit,

how thick is the ally out of interest??
Regards Tony C (COOPS)
Image
MS2 V3.57 Ecu mapable efi and wasted spark ignition.
Procharger D1SC supercharger and Cossie RS500 Intercooler @ 14psi of Boost. 416 RWHP, (boost leak)
Forged 4.8 V8 kitted out with the dogs Cajones of parts. :D
Sponsored by: www.v8performanceparts.co.uk, www.interpart.biz, www.caprisport.com & www.baileyperformance.co.uk

DaveEFI
Gold Member
Gold Member
Posts: 4603
Joined: Fri Feb 26, 2010 4:27 pm
Location: SW London, UK

Post by DaveEFI »

If you can find anyone with a large scanner, scan it? Put that file in a CAD prog and draw it out?

That's basically how I copy PCBs. :D
Dave
London SW
Rover SD1 VDP EFI
MegaSquirt2 V3
EDIS8
Tech Edge 2Y

mgbloke
Forum Contributor
Forum Contributor
Posts: 523
Joined: Thu May 17, 2007 6:05 pm

Post by mgbloke »

Mine came with the heads pre cut. I had to do a small amount of fettling.
it looks to be about 2mm thick and has been rolled to give it the same curve as the block. I don't think cutting down a comp or tin gasket would work. give me a couple of days and I will trace round it.

mark

Coops
Site Admin
Site Admin
Posts: 6317
Joined: Fri Nov 17, 2006 7:43 pm
Location: Newbury, Berks
Contact:

Post by Coops »

Thanks Mark
Regards Tony C (COOPS)
Image
MS2 V3.57 Ecu mapable efi and wasted spark ignition.
Procharger D1SC supercharger and Cossie RS500 Intercooler @ 14psi of Boost. 416 RWHP, (boost leak)
Forged 4.8 V8 kitted out with the dogs Cajones of parts. :D
Sponsored by: www.v8performanceparts.co.uk, www.interpart.biz, www.caprisport.com & www.baileyperformance.co.uk

mgbloke
Forum Contributor
Forum Contributor
Posts: 523
Joined: Thu May 17, 2007 6:05 pm

Post by mgbloke »

Coops have drawn round my valley cover plate. pm your address and I will send it. Needs to be cut out of ally plate and rolled to shape.

mark

Coops
Site Admin
Site Admin
Posts: 6317
Joined: Fri Nov 17, 2006 7:43 pm
Location: Newbury, Berks
Contact:

Post by Coops »

PM sent Mark,
thank you for your help 8-)
Regards Tony C (COOPS)
Image
MS2 V3.57 Ecu mapable efi and wasted spark ignition.
Procharger D1SC supercharger and Cossie RS500 Intercooler @ 14psi of Boost. 416 RWHP, (boost leak)
Forged 4.8 V8 kitted out with the dogs Cajones of parts. :D
Sponsored by: www.v8performanceparts.co.uk, www.interpart.biz, www.caprisport.com & www.baileyperformance.co.uk

Post Reply

Return to “Exhaust, Cylinder Heads, Fuel And Intake Area”