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Pickles

Member Since: 26 May 2013
Location: Melbourne
Posts: 3784

2013 Defender 90 Puma 2.2 CSW Keswick Green

lohr500 wrote:
If you end up with the carbs removed have a look into the inlet manifold at each side. I don't know if the later V8s were like this, but the early Stage 1 V8s actually had a restrictor in the manifold each side to reduce the power !!
If I remember correctly they were easy to remove with a slide hammer and then a change to the carb jetting to up the power.

Good point.
I think that you are right. The Defender 3.5L V8 was similar to the unit installed in the Range Rover, but I think with about 50 less BHP,.....remove those restrictors, and there should be an immediate improvement (with carb jetting as above).
So my recommendation would be to get the restrictors removed, and then get the "restrictorless" engine working properly in that form.
Then, if ya're still not happy, you can modify the cylinder heads, fit a more aggressive camshaft, and a better exhaust.
Pickles.

18th May 2016 5:13am

Iggle piggle

Member Since: 10 Sep 2014
Location: Wales
Posts: 378

1989 Defender 90 V8 Petrol ST Alpine White

I think the inlet restriction plates were only fitted to stage ones & early drum braked 90/110 but could be wrong,
for the sake of removing a carb (easy job except for one bloody nut!) its worth checking

I would also check the ignition timing or if you haven't got access to a strobe light try advancing it (turn the distributor clock wise) & take it on a short run,
if it improves the performance either the base timing was wrong or the advance mechanisms aren't doing their job

18th May 2016 10:37am

100inch

Member Since: 15 May 2012
Location: Brunswick
Posts: 411

2010 Defender 110 Puma 2.4 CSW Santorini Black

Your car should easily do 140-160km/h at around 18-22lt/100km average. My money is on a worn camshaft. m

25th May 2016 7:45am

mse

Member Since: 06 Apr 2008
Location: UK
Posts: 5035

2016 Defender 110 Puma 2.2 XS CSW Scotia Grey

Yes, i remember removing some restricter now you mention it, i think that might have been that plate...mine was B reg if i remember correctly Mike

25th May 2016 11:15pm

100inch

Member Since: 15 May 2012
Location: Brunswick
Posts: 411

I thought only the Stage 1 had restricters? m

26th May 2016 3:54am

siwady

Member Since: 28 May 2015
Location: Dubai
Posts: 22

2012 Defender 110 Puma 2.2 SW Sumatra Black

Sorry for not responding earlier as I was travelling ... but now I am back and ready to Rooollll!

Thanks a lot for the responses ... I will keep you updated with the progress or if I end up selling it again

29th May 2016 5:29am

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