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Hi everyone,

Just a query for advice. As some of you know and some don't, I changed my wastegate on my GT3 to a new alloy one and have had problems since. It has been looked at by 3 different places and has come back different everytime but is still not right. I believe this to be a set up problem on the car but am just throwing it to the floor for your input.

I lastly had the wastegate adjusted by a STR of norwich. The set the car up statically as they do not have a rolling road to set it up on. At the moment, I believe the car in its current setup is overboosting.

The turbo starts spooling a little before 3000rpm and in 3rd and 4th gear when I am giving it some on the dual carriageway, it revs up to about 4500rpm before the engine appears to stall. I believe this is the fuel cut off kicking in due to an overboost. Before that, the car feel very rapid but with the current problems, the best speed in 5th before I get this stall and loss of power is way below what it should be.

No urgent response required as I am currently in sunny Iraq and won't be back near my car until April though as all of you know as owners, when you have a spare moment to think and the car is poorly you tend to think about it.

I am planning on my return from Iraq to chip the car with Marcus' 280bhp chip though until this problem is fixed and the car is setup as it should be, I don't want to start findling with more things. All the 3 garages had a go at setting this up but without good working knowledge of the Esprit, I think they all were waning a little so decided to ask the real experts :devil:

Regards

Adam

Adam

1999 Lotus Esprit GT3

1985 Reliant Scimitar SS1 1600 though will be an 1800Ti upon completion (Currently in bits all over the garage and has been since 2004)

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Hi Adam,

Have you ran freescan on your car to see what the boost is doing?

Did any of your garages set up the actuator with a boost gauge and pump?

If you want to send the actuator to me, I'll test it out and have it back within 48 hours?

Have you looked inside to make sure nothing is damaged? I can send you a spare diaphram and/or spring if you like?

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At the moment Dave, I am in Iraq though have decided I will purchase freescan so it is waiting for me when I am home in April.

I do not believe it is the wastegate itself. I think it is to do with the setup.

Following the guide on setting up the wastegate, I am going to get a gauge and pump and check that it is set as it should be. I am unsure whether the garages did with a gauge and pump so can not answer that.

Thanks for the offer of a new diaphragm/spring but I am sure that the wastegate itself is fine.

Just a query reference testing the boost through freescan. How do you acheive this?. Do you rev the car in neutral or can freescan assess the car on the move?

Not wanting to ask a dumb question but I am yet to use freescan.

Regards

Chats

Adam

1999 Lotus Esprit GT3

1985 Reliant Scimitar SS1 1600 though will be an 1800Ti upon completion (Currently in bits all over the garage and has been since 2004)

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You don't have to buy Freescan, it's free hence the name!

LEF sell USB cables for

88 Esprit NA, 89 Esprit Turbo SE, Evora, Evora S, Evora IPS, Evora S IPS, Evora S IPS SR, Evora 400, Elise S1, Elise S1 111s, Evora GT410 Sport

Evora NA

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Hi Adam

I have an aftermarket Wastegate on my 88 turbo and have had no issues with it at all. The mechanic who fitted it is a diesel turbo specialist and had never seen an Esprit before but now it runs a nice smooth 10.5lbs of boost and is a lot more stable than the old Garret Wastegate.

I bought a Turbosmart - streetgate.

Not sure if available overseas or if only an aussie product. It is low profile and quite cheap.

Hope this helps

Justin

"Laugh" and the world laughs with you - "Cry" and you just wet your face...

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Do you have a boost gauge of some sort?

You need to know how much boost it's producing. Freescan will tell you that I think, but I don't have the software myself (I have an emerald ECU) but you do need to know.

If the spring is too soft, then when being setup, it will have been set to allow a load of boost with a soft spring. that will then cause 'spiking' when the car gets a lot of exhaust pressure.

The trick is to have the correct spring really, rather than shorten the length of the rod too much on the wastegate to get the amount of boost you are looking for.

you really need an accurate idea of how much boost is being made normally, and on transient overboost (spiking)..

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Hi everyone,

Thanks for all the great advice. Looks like the way ahead will be to firstly acquire freescan then get a better impression from this of what my car is exactly doing.

Then I should be able to move on from there.

Roll on April so I can tinker!

Kind regards

Chats

Adam

1999 Lotus Esprit GT3

1985 Reliant Scimitar SS1 1600 though will be an 1800Ti upon completion (Currently in bits all over the garage and has been since 2004)

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Chats

Have you or anybody tried the rolling road on Salhouse Road Norwich? I go past it everyday on the way to work. Often evos and stuff there. Just wondered if they are any good and how much they usually cost?

Buddsy

 

"Belief is the enemy of knowing" - Crrow777

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Have you or anybody tried the rolling road on Salhouse Road Norwich? I go past it everyday on the way to work. Often evos and stuff there. Just wondered if they are any good and how much they usually cost?

Buddsy

Hey Buddsy,

Which one is that? Do you have the name of the garage?. If it is Clive Atthowe then he charges about 90 ish for time on the rolling road. If not, then probably haven't tried.

Chats

Adam

1999 Lotus Esprit GT3

1985 Reliant Scimitar SS1 1600 though will be an 1800Ti upon completion (Currently in bits all over the garage and has been since 2004)

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