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P4 Paul · Posted: Sat Jul 26, 2003 1:27 pm Post subject: octane grade

anybody know what the best octane grade is for 33 1.7 16v injection non-cat?,are these octane booster in a bottle any good?

Errol · Posted: Sat Jul 26, 2003 2:48 pm Post subject:

I run my series 3 16v cat with 98 RON. It goes so much better, runs smoother and just overall makes the car better. Id suggest atleast use premium ( 95 RON ), but not 91 RON.
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91 Alfa Romeo 33 16v * SOLD*
Lowered 45mm
15 x 7 inch advanti wheels
Falken 195 low profile
K&N Pod filter
Cannon 2inch exhaust from cat-back with 3inch tip.

burgo90 · Alfa Sprint Joined: 29 May 2003 Posts: 118

the higher the octane grade the better ur car will go quite simple really and bein as these fuel additive bottles add octane they will make the car go better
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http://www.novaload.net/features/viewfeature.php?ref=881

Matt Stolton · Posted: Mon Jul 28, 2003 5:49 pm Post subject: It makes a little difference

98 ron did seem to improve my carbed S2 1.7, but it was tuned for running on 98 ron.

Power didn't seem to increase, but at max revs in top, i did get about 5mph out of it when running 98 ron, compared with running 95. However, again note, my carbs were tuned with 98 ron in the tank.
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Regards

Matt

Ex Alfa 33 'GTA' (P4 with Knobs On)
Now cruising in a 166 3.2 Ti!!

Admin · Posted: Mon Jul 28, 2003 9:23 pm Post subject:

Hi

It should be set up to use normal 95 RON fuel. The 33 can be set up to use 95 or 98 RON fuel by changing a "relay shaped device" (or 91 / 95 RON with a cat).

If the car is set up to run on 95 RON fuel then you will gain nothing by running it on 98 RON fuel (and it makes no difference at all to how my P4 runs).

It is also possible that the car has been chipped and so needs 98 RON fuel

All the best

Keith