Power boost for the esprit turbo se.

[devilfish]

what to get and where to get it? Is it exhaust,chip I need? Can I get 330hp?

[cnh1990]

Marcus will take care of your needs. Be careful of the added HP. Visit his website.


Moto-Concept
www.moto-concept.de
Borsigstrasse 18
65205 Wiesbaden
0 61 22 / 93 94 55

Calvin 90 SE

[devilfish]

Can I drive it as "usual" with the 330 hp uppgrade?

[cnh1990]

If you mean as usual as in casual drive, why yes you can. The added HP will come on with full boost (1 bar+ with a re-chip) and the more you use it like that you will have the added stress to the already weak points of the car. Most in the turbo and possibly in the already 2nd gear/syncro areas. Make sure you have the valve clearences adjusted properly at the proper intervals or you may burn them. A BOV kit would be nice to a bit more gentle on the turbo. I don't see anything bad with what you are doing as long as you are not making a habit drag racing the car as that is not what the car is built for. Just use your head and you will be fine.
Calvin 90 SE

[devilfish]

could you explain what you mean about "Make sure you have the valve clearences adjusted properly at the proper intervals or you may burn them" ? Not clear on that one... And no, I dont drag race the car very often, but it happens. Its hard not to when you have that ferrari in the other lane and you know you can beat him . Have no problemes so far with the syncros or turbo. Going to send the turbo for a rebuild/tuneup and "flowprep" this winter.
Is the esprit really so sensetive on hard redlight to redlight "races"? I make pretty hard starts on the track with no probleme?

Thanks

[devilfish]

and up we go

[cnh1990]

The valve clearences are pretty critical as they use the intervals when they are open to help cool them off. As the cam lobes and the top pieces wear the valves do not open as far as when new. Also the contact time with the cams dissapates heat. When the valves are out of spec (not opening enough)and run hard they will eventually burn. The transmission of our cars are a bit more fragile than I would like them to be. Yes I have done my share of street racing and am very careful. The 2nd gear/syncro is especially frail with many a owner grenading them. They just come apart if the shift is not fully completed with the clutch is released. Make absolutly sure the 1st to 2nd gear shift is firmly seated before full boost is applied. If you are speed shifting and prematurely release the clutch you are in big trouble.

[emiller1]

Has anyone done the 330hp conversion? I'm wondering if it is worthwile...

[cnh1990]

I would say adding 50 or more HP would be noticeable.
I can tell the difference between an SE and an S4s thats for sure.

[devilfish]

thanks for the reply

How much will a exhange of second gear syncro cost?
What can I do about vavles then?
And will a it take to get S4S preformance on a turbo se esprit? Exhaust, chip etc.

Thanks

[emiller1]

I already drive an S4s, but would like the extra 30hp, because it includes a max boost of 1.25 bar, and earlier boost mappings... It sounds like it would be worth while, but I wondered if anyone with an S4s has it.

[cnh1990]

Devilfish,
In the USA we upgrade the turbo to a ball bearing hybrid unit from Turbonetics, rechip,and rework the exhaust. The new chips from what I hear also engage the turbo at around 2K rpm. More turbo wear but better performance. The only other difference to the S4s would a little larger valves and enlarged ports that would require head mods. Are you a handy person or require the help of a shop? There is not much one can do transmission except replace the broken parts if that should happen. Although Johan has been toying with I think maybe hardening some parts and using some kind of fluid sprayer or pump for the trans. His car is quite extreme and is the guy that broke his transmission and slid sideways at 210mph at Bonneville. As far as the S4s mods I have not personally seen one with the upgrade. I would think that even 30hp would be noticable. I would think what would be more apparent would be the turbo to come on at 2K.
Calvin

[cnh1990]

Oh forgot about the valves. Just remember at the normal service times to have the valves clearances checked and adjusted if needed to keep them in spec.

[devilfish]

thanks for the reply.
Yeah im pretty hande with the tools. Done head,cam and exaust work on other cars with "over head cam" engiens.
SO it sounds like its possible to get stock s4 preformance out of a turbos se?
Is the engine / drive line /tranny etc a "time bomb" with this preformance mods, or if you drive "with the inside of your head" the car can take this without braking ?
And could you guid me where to get the parts, and what it will cost?

[devilfish]

how much can you get out of the turbo se engine whitout doing any interial mods on the eninge. Rods,piston,crank etc?

[cnh1990]

I don't know of place in Sweden where you can get the parts. I would try Marcus at Moto-Conpect he is in Germany. The other place is in the UK. Try www.lotusespritworld.co.uk Things to do first would be make sure the intercooler pump is working right (the electric pump would be nice) and if money were not a concern upgrade the intercooler as well. Cool intake air will do wonders. Get a BOV (blow off valve), update the chip, I think Marcus has the new stainless steel exhaust headers for our cars ready. If you have stock exhaust muffler update to a better one. While you are doing the exhaust upgrade the turbo to the hybrid. With those things done you should be over 300 bhp. The car can take the extra HP. It is the same transmission as the S4s with the exception of the clutch/clutch master/slave cyl. It is possible to upgrade the SE clutch system to S4s but all 3 components have to changed. Get rid of the red hose if you are changing clutch system. I don't think you have to change the clutch system but that is up to you. So it will alright as long as you do not do foolish things like rev the car and drop the clutch or miss a shift. The S4s does have better brakes and plus power steering. Marcus can quote you the parts by email or SJ sports cars in the UK can advise you also. Andy Whittaker and Justin found at Esprit World can also advise you where to get parts in Europe. I am in the USA so it is hard get parts to you and it may be cheaper to get parts there. Although when I get parts mailed to the USA from the UK I do not pay VAT or some of the other taxes. Good luck,
Calvin 90 SE

[devilfish]

ok so 330 hp is possible? So far so good

Isent the s4 heavier then the turbo se?

So ONE missed shift and the syncors say booom?!!? hmmm :/ We all have our "bad" days of driving.

What in theroy would a turbo se do in the quarter mile with these figures, high 12s? And what about top speed?
I guess the drive line dont like drag racing in the esprit hehe

[cnh1990]

Yes HP over 300bhp is possible with about a 10-15% reduction through the transmission at the wheels. Yes the S4/S4s is a little heavier than the SE. Just a little here and there with the added power steering, suspension changes, ABS brakes, etc. Well you can miss a shift and not destroy the 2nd gear/syncro. The danger would be if the gear teeth are barely touching and you release the clutch while flooring the gas pedal engaging 1+ bar of boost you will turn 2nd gear or syncro into to pieces. That would be a bad day of driving. Yes the Esprit can do mid to high 12's depending on the tires. Top speed on the highway is about 165+ MPH. I have done 150 MPH for 5-6 miles while racing against sport bikes. Were they suprised. The were getting beaten up by the wind while I was in comfort with the stereo on. Drive lines in general don't like drag racing, even pro racers blow theirs all the time and our cars are not made of that sort of thing.
Good Luck,
Calvin 90 SE

[devilfish]

so test my car after the "tune" up on the 1/4 mile is a bad ide. I mean just to se what it runs?
Can you uppgrade the drive line, harder drive shaft etc?
And how will the clutch take this extra power?

[SydneySE]

I just changed my exhaust on my 89 SE to 3" from the turbo back, Hi-flow cat (3"),no EBPV and straight through 3" muffler (all stainless). Noticeably faster. Am upgrading Turbo next -a GT-25 variation probably with 0.86 a/r turbine housing; 0.70 a/r compressor housing; 48 trim (T04s) compressor wheel; 76 trim turbine wheel; 48lbs min Comp Flow max (rated at 440Hp of flow). will put this on as soon as I get the S4s (330hp) chip from moto-concepts...