Gentry To Gti!

[donkeymatt 0]

Hi everyone,

I have recently moved out to France, and after a few months of searching, have found myself a project car in the form of a 1.9 GTI in "Gentry" finish.

It has a manual gearbox, with immaculate interior and bodywork. The plan is to keep the car road legal so that I can drive it to track days, while in the meantime prepare it for competition use.

My question - the engine (if I understand the lingo correctly!) only puts out 105bhp opposed to the 130bhp from other 1.9s.

What has been done to de-tune it, and what can be done to get this power back?

Thanks in advance for your help!

Matt

[Paul_13 212 1 Cars]

I think they changed the pistons to lower the compression and possibly a cam (unsure on that one though)

[richsmells 2]

Engine is lower compression, rather than D6B 9.6:1. It's the DFZ from this chart IIRC:

 

http://www.205gtidrivers.com/info/techspecs.html

Edited December 15, 2009 by richsmells

[Gentrix 2 1 Cars]

Yes, pistons, Head from the early 1.6 with smaller valves and more squish area - then the milder cam and the cat.

You can use the head from the 120 dkz or 128 d6b(?).

But this could be too much compression ratio - some say this combo with a good cam is good for 130-140 hp - others have problems getting it run properly.

 

 

*did this take me almost 10 min. to type on the phone?

Edited December 15, 2009 by Gentrix

[petert 590]

Yes, pistons, Head from the early 1.6 with smaller valves

 

No, the head is unique to the DFZ. It does have small valves like early 1.6, but they are a different length, ie 105mm vrs. 108mm. The chamber is quite large at approx. 48cc, thus the low 8.4:1 CR even though they run 1.6 pistons. Either skim 2mm off the head, or fit a large valve/small chamber head, provided of course you have the engine management to cope with the high CR. The cam is very tame for an 8V - 218 deg. @ 0.050" and 0.405" lift.

 

The words "Gentry" and "competition" don't mix very well. Nice car to cruise around in but it's never going to handle and there's so many things that will changing.

[donkeymatt 0]

Excellent - thanks for your help - that sounds like a good challenge!!

[Henry Yorke 269 3 Cars]

Turbo it!. I have a "Gentry" engine in my 1.9 CTI. Perfect for running low pressure boost through with standard internals 406 SRI stuff just bolts straight on. I now have 167bhp and 200lb ft of Torque and it is a lovely refined cruiser too.

[Kobayashi 35 2 Cars]

@petert

interesting info, thanks for sharing. do you happen to have any "official" or verified source for that? DFZ specs seem scarce, this is actually the first time i see some numbers regarding the camshaft.

[petert 590]

@petert

interesting info, thanks for sharing. do you happen to have any "official" or verified source for that? DFZ specs seem scarce, this is actually the first time i see some numbers regarding the camshaft.

 

I measured them using CamDoctor.

[Kobayashi 35 2 Cars]

thanks.