Grief Update - Engine Rebuild
Discussion
Richieboy3008 said:
Hi Matthew,
I've bookmarked, read 15 times and even printed off so I can read when I don't have access. Needless to say, this deserves a +1!
Do you have any plans to crash into an Astra?
You been in the RAF Richie? "Per Ordure, Ad Astra".I've bookmarked, read 15 times and even printed off so I can read when I don't have access. Needless to say, this deserves a +1!
Do you have any plans to crash into an Astra?
Loosely translated as "If it's s
t, it will be a Vauxhall"Matthew Poxon said:
Oh very nice indeed, have you got a picture of you new toy?
Yes I remember reading about the improvements you completed on Grizzly, they were very much the inspiration for my car is it stands now. I seem to recall you were one of the first owners who had the ACT twin plenum. I remember reading you website which was again early inspiration for my blog so thank you for that.
Yes unfortunately there are indeed much more expensive options now
I am feeling the financial pain already and it hasn't really got going yet 
I have learnt over the years that naturally aspirated RV8 tuning is very expensive and once you are over 300BHP you are very much into diminishing returns. I am hoping for 330BHP & 340ftlb (measured at the wheels) anything more will be a bonus.
This is what the car produced on the TVR Power Dyno on it last run:
TVR Power dyno reads in wheel BHP so converted to flywheel using the below site (I am not sure how accurate this is)
http://www.mk5cortinaestate.co.uk/calculator4.php
BHP – 324BHP
Torque – 348ftlb
Love these curves me Yes I remember reading about the improvements you completed on Grizzly, they were very much the inspiration for my car is it stands now. I seem to recall you were one of the first owners who had the ACT twin plenum. I remember reading you website which was again early inspiration for my blog so thank you for that.
Yes unfortunately there are indeed much more expensive options now
I am feeling the financial pain already and it hasn't really got going yet I have learnt over the years that naturally aspirated RV8 tuning is very expensive and once you are over 300BHP you are very much into diminishing returns. I am hoping for 330BHP & 340ftlb (measured at the wheels) anything more will be a bonus.
This is what the car produced on the TVR Power Dyno on it last run:
TVR Power dyno reads in wheel BHP so converted to flywheel using the below site (I am not sure how accurate this is)
http://www.mk5cortinaestate.co.uk/calculator4.php
BHP – 324BHP
Torque – 348ftlb
Here’s my refreshed 450 by Dom.
885 cam 38 mm trumpets and standard 4.6 heads. Tad more compression but basically a standard 4.6
But running MBE so maybe a bit more power than standard, feels like it anyway
At the fly
298 bhp
340 ft lb
RichB
OMG they are beautiful, one for each occasion.
Matt,
Yours will sound much better with those ITB, H234 & 11.5+ compression.
I’m running an H224 on a smaller capacity so you might be ok running a H234 on the road as you'll be flowing more air, what size are you ITBs? My idle is very stable at 950rpm which is great for manoeuvring and doesn’t shunt in slow moving traffic, however I have to admit its not super smooth with the SD1 twin plenum and annoyingly its smoother with my old 4.3 single plenum.
I see your MBE 9a9 ECU has 8 individual injector drivers, therefore are you going fully sequential? You may as well go the whole hog while you can and may help improve your drivability with your full competition cam and very high compression ratios.
http://www.sbdev.co.uk/Engine_Management_Systems/E...
That's a cool picture of your rockers, have you noticed the Yella Terras don’t fit the JE end posts without widening the gap which is an easy fix. I forget the Group A rockers are heavy and not rollers, also when ever a set came up for sale the adjusters were always welded up which confused me and put me off.
This picture of some Group A Rockers should make you appreciate your efforts buying your Yella Terras.
A very lucky Griff owner stumbled across the TVR sliding ITB setup and bought them to replace his SD1 twin plenum but I don’t know if he actually got them running ok. I can only guess they were developed for the early Tuscan Challenge race cars before they started using the AJP8.
Good Luck with the build and keep us updated.
OMG they are beautiful, one for each occasion.
Matt,
Yours will sound much better with those ITB, H234 & 11.5+ compression.
I’m running an H224 on a smaller capacity so you might be ok running a H234 on the road as you'll be flowing more air, what size are you ITBs? My idle is very stable at 950rpm which is great for manoeuvring and doesn’t shunt in slow moving traffic, however I have to admit its not super smooth with the SD1 twin plenum and annoyingly its smoother with my old 4.3 single plenum.
I see your MBE 9a9 ECU has 8 individual injector drivers, therefore are you going fully sequential? You may as well go the whole hog while you can and may help improve your drivability with your full competition cam and very high compression ratios.
http://www.sbdev.co.uk/Engine_Management_Systems/E...
That's a cool picture of your rockers, have you noticed the Yella Terras don’t fit the JE end posts without widening the gap which is an easy fix. I forget the Group A rockers are heavy and not rollers, also when ever a set came up for sale the adjusters were always welded up which confused me and put me off.
This picture of some Group A Rockers should make you appreciate your efforts buying your Yella Terras.
A very lucky Griff owner stumbled across the TVR sliding ITB setup and bought them to replace his SD1 twin plenum but I don’t know if he actually got them running ok. I can only guess they were developed for the early Tuscan Challenge race cars before they started using the AJP8.
Good Luck with the build and keep us updated.
phazed said:
I wouldn’t worry too much about sequential.
The bigger the engine the more it tames a lairy camshaft.
My 5.5 is a real pussycat on the H404 cam , will pull cleanly from 800 rpm in 5th or will let all hell rip when you floor it.
Mine is an Emerald and was mapped by Joolz
MattThe bigger the engine the more it tames a lairy camshaft.
My 5.5 is a real pussycat on the H404 cam , will pull cleanly from 800 rpm in 5th or will let all hell rip when you floor it.
Mine is an Emerald and was mapped by Joolz
I’m sure Peter is right, however as you’re buying a fully sequential ECU I'm sure you've considered installing a cam sensor while you can to keep your options open. You could then run both fully & semi sequential and determine and take advantage of any benifits.
yonex said:
Good stuff. Have a similar spec. Makes a fab road engine with potential for big numbers with the right breathing. I went for a soft cam for a wide spread of torque.
You have a JE 5.2 if memory serves me correct? I am glad to hear you are happy with yours. I am hoping my cam will not be too wild and tameable by the ECU and ITBs, I cannot be too bad anyway as it is still hydraulic. Do you know what cam you have in yours?Matthew Poxon said:
You have a JE 5.2 if memory serves me correct? I am glad to hear you are happy with yours. I am hoping my cam will not be too wild and tameable by the ECU and ITBs, I cannot be too bad anyway as it is still hydraulic. Do you know what cam you have in yours?
Hi. Yes, JE 5.2 with steel rods, cross bolted and top hatted etc. I’ll dig out the spec. I’d like a better intake for mine. stevesprint said:
Matt
I’m sure Peter is right, however as you’re buying a fully sequential ECU I'm sure you've considered installing a cam sensor while you can to keep your options open. You could then run both fully & semi sequential and determine and take advantage of any benifits.
Fully sequential is an interesting topic and one I have researched into a little. I was originally set on fully sequential, however JE advised against it saying it will add complication and expense for very little gain and Power have said the same thing. Dom did say if I want it then yes he will do it but he was concerned about the additional dyno time cost for little return. I did also speak to another ECU guru who said the same thing.I’m sure Peter is right, however as you’re buying a fully sequential ECU I'm sure you've considered installing a cam sensor while you can to keep your options open. You could then run both fully & semi sequential and determine and take advantage of any benifits.
At this time I am going to take the advise and park the sequential idea and put it on the possible future projects list. I am trying to strike a balance between getting the car completed to a good spec first time but not at the expense of it turning into an unnecessarily long and complicated project. I will put this on the back burner along with items such as:
Wildcat heads
Roller Cam
Ceramic coated manifolds
Air ducts to the ITBs
I can always pick these up later as winter projects if a chose to do so.
Regarding the CPS I did look at a flywheel pick up as some others have done but I quite liked the idea of the reusing the dizzy gear as the sensor will be nice and accessible should it need replacing.
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