Turbo Toaster

[Os8472]

New poster! (less than 10 posts)

Since my thread off the old site has been lost I guess I should start afreash 1

Well this is the turbo toaster, a 1986 phase 1 GTTurbo in pearl white

https://www.rtoc.org/boards/picture.p...&pictureid=635

So what am I doing to it now, well if you've looked at my profile you'll see some interesting entries on my spec list, yep its EFI time baby
This is how she currently looks, 2 thirds of the way through the conversion, roll on wednesday when she goes to Emerald for mapping


https://www.rtoc.org/boards/picture.p...&pictureid=810

[Adey aka Ewok]

that plenum looks tiny? or is it the picture?

[Andrew Cooke]

that plenum looks tiny? or is it the picture?

it looks small and oval, but I think it may be round and chamfered.

[Scoff]

looking good injectors might be in a bit steep for my liking, but I'm no manifold expert

[Os8472]

New poster! (less than 10 posts)

that plenum looks tiny? or is it the picture?

We actually did a test by blocking all the holes in it and filling it with water, we did the same with the stock manifold and the injection 1 was nearly a 1/4 of a litre larger.

looking good injectors might be in a bit steep for my liking, but I'm no manifold expert

They may not be but there is 1 for each cyclinder so thats gotta be good

[Scoff]

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there is 1 for each cyclinder so thats gotta be good
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definately a good start

[Os8472]

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there is 1 for each cyclinder so thats gotta be good
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definately a good start

yep, the dizzy is gone aswell and the throttle body is much larger 2, I nicked it straight from a Mitsubishi Starion

[Os8472]

Here's a side on pic of the manifold, yes the injectors are steep Scoff but the boosted air will carry the fuel into the head no probs, we even got a chap who used to work for the seat WRC rally team back in the mid nineties and he said it would be fine if I run enough BOOST

https://www.rtoc.org/boards/picture.p...&pictureid=634

[Scoff]

Credit me some basic knowledge of manifolds, it isn't your boosted-air I'm worried about

Its a bad thing to assume stuff, like the person your talking to a) knows nothing (me) or b) knows everything (your WRC friend)

Hopefully it'll be OK, but if you struggle to map it at low load then you'll know where to look

Here's a side on pic of the manifold, yes the injectors are steep Scoff but the boosted air will carry the fuel into the head no probs, we even got a chap who used to work for the seat WRC rally team back in the mid nineties and he said it would be fine if I run enough BOOST

https://www.rtoc.org/boards/picture.p...&pictureid=634

[Miller]

Looking good mate

with regards to manifold design a good rule of thumb is......

• Each runner should hold the capacity of one cylinder.
• The plenum chamber should hold the capacity of the engine.

Chris

[Os8472]

Credit me some basic knowledge of manifolds, it isn't your boosted-air I'm worried about

Its a bad thing to assume stuff, like the person your talking to a) knows nothing (me) or b) knows everything (your WRC friend)

Hopefully it'll be OK, but if you struggle to map it at low load then you'll know where to look

Wo wo wo I'm not trying to say I know more than you Scoff, there ain't a chance of that happening, I'm just telling you what I've been told and the fact that the guy that actually built the manifold does this kinda thing all day long (you should see his Lancer, a custom marvel) and has so far not had any probs with his work, yeah I know you shouldn't belive everythin your told by "experts" but in this case I wouldn't have a clue where to even start so I'm having to take a leap of faith and if it don't work then he will recive a good shoeing

[Os8472]

Well its done, my R5 now runs EFI she runs sweet as, starts first time everytime and there was no problem mapping the VNT but the clutch decided it was gunna start slipping before we could finish a full map so for the time being its got a 4grand rev limit to stop me breaking somit and as soon as I get the chance o change the clutch it'll go back for final mapping, this does mean I won't be on the track at National day though

[Kris M]

Sounds good mate.......Come on Oli, you can do the clutch before Nat Day ???

[car.crash]

lets see what it does on the track

[Os8472]

Sounds good mate.......Come on Oli, you can do the clutch before Nat Day ???

Yeah I could get the clutch done but I'd only be able to get another 480T jobbie in time and there wouldn't be time to get the mapping finished

oh well maybe next year

[Os8472]

Oh my god, I just drove the 5 properly for the first time since I converted it to EFI, yeah the mapping isn't finished cus of the clutch but she don't have take off and thats off boost, when the boost hits all hell breaks lose and thats just 14psi

I'm scared

[Scoff]

I can only begin to imagine how fast it must feel, well done

[Os8472]

I can only begin to imagine how fast it must feel, well done

Its not in the league of yours but I have felt acceleration like that since I had a go in an ariel atom

I really am scared

[paul b]

don't be scared......enjoy the fear.........

thats why God gave you a muscle round your ar5ehole

[BlueFish5Gt]

New poster! (less than 10 posts)

Is it that much of a difference between a carb and E.F.I?

[dangerous dave]

don't be scared......enjoy the fear.........

thats why God gave you a muscle round your ar5ehole

[Os8472]

don't be scared......enjoy the fear.........

thats why God gave you a muscle round your ar5ehole

New poster! (less than 10 posts)

Is it that much of a difference between a carb and E.F.I?

Dunno fully yet but off boost power is defo up and when the boost starts to build it seems to pull harder, having the bigger throttle body has gotta make a difference to low end torque, could just be my carb was overfueling alot

[Andrew Cooke]

it should make a big difference off boost, engines don't like to suck through straws.

[Os8472]

it should make a big difference off boost, engines don't like to suck through straws.

I've defo noticed a difference but the mapping isn't finished yet so there still more to come

And I'm still scared

[newbstar*]

New poster! (less than 10 posts)

get a clip of a run soon.or a graph of the final mapping session.

[Os8472]

New poster! (less than 10 posts)

get a clip of a run soon.or a graph of the final mapping session.

I'll be at ND so you can see it running in the metal yaself

[Rob@Backyardracing]

Get to pod my friend... would like to see your traps before winter.....

[Os8472]

Get to pod my friend... would like to see your traps before winter.....

Thats the plan

[Rob@Backyardracing]

11th???????

[Os8472]

11th???????

Doubtfull, I'm gunna do the clutch on the 4th and the mapping will need finishing befoe any 1/4mile fun can begin

[Adam L]

don't be scared......enjoy the fear.........

thats why God gave you a muscle round your ar5ehole

[Os8472]

don't be scared......enjoy the fear.........

thats why God gave you a muscle round your ar5ehole

Its gotta be said, that is gunna go down as the best qoute in the entire RTOC history

[Os8472]

Still don't know why I won when that mint R21 in black was there but I ain't half feeling smug

https://www.rtoc.org/boards/picture.p...pictureid=1261

[paul b]

Its gotta be said, that is gunna go down as the best qoute in the entire RTOC history

and after Mallory you its a statement as well as a quote....
ROFPMSL

[Os8472]

Well the taster has been held for 3 weeks since I fitted the new clutch, the first time I tried to drive it, it stalled and wouldn't restart, due to my change in status I didn't even look at it, just pushed it back in the garage and left it but 2day I got myself into gear and got on with trying to fix and what a dumb arse I am, it was a stupid little problem that I should've spotted straight away had my mind been on the job in hand, see guys this why women are evil, they take ya mind off ya car

[Os8472]

Just got back from emerald after what should have been the final mapping session but the toaster decided this was not to be, first off we could stop the vnt overboosting, Dave's underware suffered major damage when it hit 26psi

By taking it off the dyno it sorted itself out so we went to put it back on when we noticed the large puddle of oil directly under where the bottom pulley is, there was oil everywhere whats worse is I only resealed the the timing cover and replaced the oil seal for the bottom pulley on saturday, can't see where its coming from and it only seems to happen at high oil pressure

But I gotta say its gettin faster, at only 10psi I saw 170wheel horse power at 1 point and thats before we tried winding up the boost

[Os8472]

Now because of the slight problems I had on the dyno on monday my 5 still has a 4500rpm rev limit for safety reasons I wasn't expecting it to beat anythin but 2day I was tailgated by a a Jag XJ6 for a couple of miles when we came to a round about that exits onto a dual carage way and I knew the Jag was gunna for it so I put my foot down and bugger me if I didn't pull away from it like he was stood still

[Mudslinger]

well done fella car is coming along nice

what sort of power are you aiming for ? the mapping sessions can be very frustrating for the operator all the stop starting finding the little things needing looked at that are only highlighted once its seeing some revs, im almost over that bit now , ive just to try get some more miles on mine , get some fuel cosumption figures and drive it , then ill take it back for a final check of the map and maybe a few tweeks .

[Os8472]

Dunno what to expect power wise, it'll make as much as it makes, I'd like 200wheel horse power but I'll have to wait and see.

How's yours going Mud? if you've got a finished ignition map I might want to nick it

[Andrew Cooke]

How's yours going Mud? if you've got a finished ignition map I might want to nick it

you might want to, but that would be a very bad idea, your engine is too different to Mud's to even consider doing that.

[Os8472]

you might want to, but that would be a very bad idea, your engine is too different to Mud's to even consider doing that.

True but it can be changed to suit mine

[Os8472]

Right I've sorted the oil leak that ended the last mapping sesion early, turns out it was the rubber seal between the bottom of the timing cover and the sump.

With help from JP and his LM-1 We've been able to raise my rev limit safetly to 5500rpm to make the car abit more fun before it goes back to emerald, but I'm now having major boost creep problems, the VNT boosts to 11psi as normal but as the revs climb past 4000rpm it creeps up fast, by 5500rpm its nearly 25psi, anyone got any ideas why this is happening now when it never did on the carb?

Could the throttle body be too big? or is there somit else I should look for?

[Andrew Cooke]

did you ever check the boost at the carb top? It might just be that now you've removed the 25mm restrictor the boost is getting to the inlet.

Throttle size shouldn't give you boost creep, lack of flow through the turbine will.

[Scoff]

did you ever check the boost at the carb top? It might just be that now you've removed the 25mm restrictor the boost is getting to the inlet.

Throttle size shouldn't give you boost creep, lack of flow through the turbine will.

or too small a wastegate port

[Andrew Cooke]

or too small a wastegate port

often the case with a VNT

[Scoff]

oh, vnt I should read the whole thread I suppose.

sounds like he needs a w/g aswell, or the vanes are not opening as far as they could or should ? dunno, never set one up.

[Trevhib]

often the case with a VNT

This is a top thread. It's amazing how difficult it is to get these C1J conversions successfully/fully mapped. Every time I read an update on an EFI thread there's been another attempted mapping and yet another set back. It's like carrot on a stick and particularly frustrating for the neutral, let alone the owner. Keep at it

More pics and print outs please...

[Os8472]

Its proper annoying, I knew that no one has managed to map a VNT with EFI properly but after the first session it seemed it wasn't gunna be a problem best layed plans huh

It makes no freckin sense to me why it won't work, all I have done is replaced the single carb with 4 injectors, a bigger throttle body and the dizzy with a coil pack and everything works perfect, just not the VNT.

Yes the engine is running more effiecently but that alone shouldn't be causing this.

Its gotta be do able, I mean look at the VW golf, the mk4 diesel had a vnt and from what I've been told the mk5 GTi has 1 too, so how the hell did VW do it.

I'm gunna try a smaller body and I'll let ya know how I get on, now does anyone know what car uses a body somewhere between 30mm and 45mm?

[Os8472]

did you ever check the boost at the carb top? It might just be that now you've removed the 25mm restrictor the boost is getting to the inlet.

Throttle size shouldn't give you boost creep, lack of flow through the turbine will.

When I had the carb I was getting 14psi before the carb and 10psi after, now it boosts up to 14psi then settles down to 10psi as normal but after 4500rpm creeps fast and thats measured at the manifold

[Andrew Cooke]

if you really think a smaller throttle is what you want try and limit how far the one you have opens.