free hit
counters
87 Turbo Esprit - Turbo Options - Induction/Turbo/Manifold/Exhaust - The Lotus Forums #ForTheOwners Jump to content


87 Turbo Esprit - Turbo Options


Recommended Posts

Hi

I have an '87 Turbo HC and my turbo is leaking oil and looks like it needs replacing. I have looked at a few options and have questions for anyone in the know.

My options are:

a) Buy a new turbo - If I took this option is the Garrett T3 a standard turbo or would I need one specifically for an 87 Esprit??? Anyone know of inexpensive suppliers?

B) Recondition my current one. Apparantly cheaper - albeit with postal costs and turn-round times - again, anyone have a recommended company that can do this?

c) Fit a non- standard turbo with integral wastegate. This is my preferred option as I have had problems with a siezed wastegate and would be interested in leaving this to remain siezed and have the wastegate on the turbo. Has anyone done this? Does it require much modification, is it expensive and what turbo's would be suitable??? (Suppliers??)

Thanks very much in anticipation

CK

Link to comment
Share on other sites


Upgrade today to remove Google ads and support TLF.
  • Replies 10
  • Created
  • Last Reply

Top Posters In This Topic

Where's the oil getting out, James? Is it coming out of the oil inlet pipe, or the oil drain pipe - if so, unlikely to be turbo trouble, but leaky pipes...the drain pipe is a convoluted stainless pipe and is expensive, the inlet pipe is a Goodridge style flexible hose. Does your turbo deliver the correct boost pressure? If it does, it's probably OK. Take off the air trunking leading to the compressor inlet and check the compressor turns freely, the blades aren't broken and there's not too much radial movement when you grab the end of the shaft and move it about. There's no magic in a turbo, it's a shaft with a turbine on one end and a compressor on the other suspended by two bearings...which may be plain or ballraces. It's perfectly possible to overhaul a turbo yourself...except you will probably have to source the parts from the US, there's a very helpful source called the G-Pop Shop( www.gpopshop.com) who can supply all you need plus helpful advice and instructions. As long as you mark the relative positions of the rotating elements on the shaft and re-assemble them in exactly the same position, you won't have any imbalance problems. Have a look at their website and see if you fancy giving it a go...it's an awful lot cheaper, too!

Scientists investigate that which already is; Engineers create that which has never been." - Albert Einstein

Link to comment
Share on other sites

Thanks john - to be honest I'm not sure where it is coming out - I have a couple of very friendly mechanics who are looking after a few things on my car at the moment and - in changing a couple of exhaust pipes have told me that the turbo is 'pi55ing out oil and needs replacement'. I was led to believe that oil was coming from the turbo housing.

I am still almost tempted to change the whole thing if I can find a turbo with integral waste-gate as I have had my current one seize three times - however I'll get back to them to see from where the oil is emanating and possibly look at a repair on the turbo in place....

Thanks again.

James

Link to comment
Share on other sites

Hi James

I am in the middle of converting my S3 turbo to an HC turbo. The engine has come from a 88 stevens car, which also included a water cooled & integral wastegate turbo. So if you want to upgrade, then a turbo from a later car is a good starting point.

As for converting it, assuming you have the older turbo with out these features, you will need a exhaust spacer pipe from the manifold to turbo, or way to blank off the old wastegate. Reroute your cooling system slightly, from the heater feed pipe to the turbo, and either add another port to your header tank, for the turbo water out, or buy a new header tank that already has this port, which is what I have done.

Also you will need a modified exhaust pipe, turbo to silencer, as the later turbo only has 3 studs on the outlet side.

SJ does do a complete kit for this, but it is pricey.

Daz

The need for speed can be found with a Lotus

Link to comment
Share on other sites

Ok thanks very much for the info Daz - so its not a quick one for one exchange like I was hoping :(

I'll look into leaks first and then changing turbos.

Does anyone know whether the turbo from a Saab 99 is the same as the one on the G-Esprits??

Link to comment
Share on other sites

A shiny new turbo will only give you back the lost performance if your current turbo is not delivering the correct boost pressure...see your boost gauge for that! It's amazing how bad a turbo can be and still deliver the correct pressure and thus performance. When I first bought my beastie way back in 1988 (iirc) it was performing to specification, and carried on doing so. In 1991 I had the crownwheel lose two teeth, so everything came out for overhaul...on examining the turbo, I found that the compressor blades had great chunks missing from them and the bearings were shot; so I replaced the turbo with a remanufactured unit. However, even in that state, it was still blowing like a good 'un. There is nothing inside a turbo to wear; they go on for decades on trucks with no problems. All there is, once you open them up, is a shaft, turbine wheel, compressor wheel, two bearings and the seals...and the seal is a thing like a piston ring which fits tightly around the shaft. The overhaul kit from G-Pop Shop contains everything you'd need to replace, bearings and seals, and that's all you can do to them...apart from changing major parts like turbine or compressor wheels or the shaft itself. In that case, the unit would need specialist rebalancing. As long as all the big bits are OK, you can do it yourself for about $80...just ensure that the parts go back in the same relationship to their initial assembly and the balance will be unchanged. It works, I've done it!!

Scientists investigate that which already is; Engineers create that which has never been." - Albert Einstein

Link to comment
Share on other sites

James,

I'm running a '87 Saab 900 Turbocharger w/o any problems. It also has the built in wastegate and water cooling, although, I've never hooked up the water cooling. I suspect the Saab 99 turbo is very similar to the orig. Lotus turbo except for some differences in the compressor wheels. Perhaps someone can provide more info.

Cheers, Lee

Link to comment
Share on other sites

The SE in standard form is about 260 bhp. so there is no reason why you shouldn't be able to achieve this. Andy J has put a Charge cooler on is S3 turbo and I think he is getting close to 260. Not bad for a 'G' car

daz

The need for speed can be found with a Lotus

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.



Upgrade today to remove Google ads and support TLF.


×
×
  • Create New...