Not had the 16v long so dont know a great deal about the engine in it, so excuse any ignorance. Basically the engine cuts between 6.5 and 7 thou, like it is hiting the rev limiter. However when i looked at the rotar arm today to glue it shut, it is totally different to the one in my old mk1. no spring etc, just plastic. Has it got some kind of digital/electrical cut off point? Seems to cut out earlier if i cane it straight through the rev range. How do i make it rev for longer as i want to get it tunned up soon with WUR mod, as it should be good for 180- 185BHP looking at the spec.
The 16V engine is electronically limited using the ECU. I think the actual limit is set at about 7200rpm (KR) from factory, but can be altered by changing the crystal in the ECU. A standard engine will not be able to take advantage of an increased rev limit, as the power/torque drop off before it hits it - on a standard 16V, that's about 6500rpm (KR). The limit is set in place to stop certain components in the engine from self-destructing under loads that they are not designed to tolerate. These can be replaced with uprated items, but that's when the money starts disappearing from your wallet quickly! I'm no 2.0l expert, but for the figures you are looking at, I don't think a raised rev limit would be necessary. As far as I am aware, the cams that people use for the 2.0l engine don't push the curve up the rev range that far. If I recall correctly, someone on here does have/did have a 16V that ran up to 7800rpm - I think it's all discussed in the sticky thread. HTH.
Yes, Rich is correct. You can find what your rev limit is set to by setting the MFA computer into it's secret mode and one of the readouts is the rev limit. I'm sure someone else can give you a link to show how to get into the MFA secret mode. It involves holding the MFA button down while turning the ignition on and the letting go. My old 1988 16v has the limit set to 7400rpm. Joe
cheers, anyone know about that secret mode thingy then? Would like it raised as i feel it would benifit from more revs to make the revs higher in the next gear when shifting up. Having had a 1.8 gti mk1 i miss that instant power of the 8v and hate having to wait as the revs pick up.
To get into the 'secret' MFA mode, switch the ignition off whilst holding in the MFA buttonon the end of the stalk. Continue holding the button in whilst switching the ignition back on. Switching between the two MFA modes alters the readout - you can check what they all mean in a thread posted on here about two months ago, or use Google. Some early cars don't have all the modes, so if nothing happens when you try to switch to '2' then don't worry. The rev mode on the MFA is not a limit reading but rather a digital readout of the engine speed (at least it has been on all mine.) However, as mentioned by Golden and myself, just increasing a rev limit does not mean you can can get more power/go faster/accelerate quicker, as the power drops off sharply past 6500rpm on a standard engine. In your example, you mention wanting the revs to be higher when changing up a gear, so that you are into the 'powerband' more quickly. If that is the case, then just raising the rev limit (assuming your engine could handle the extra forces exerted) would not really give any benefit - as you pass the peak power at approx 6000-6500rpm (KR) the power drops as you increase the revs, rather than increasing if you changed up a gear. Maybe a gearbox with different ratios or a higher final drive would suit your needs more? Anyone who knows what they are talking about care to comment?!
hi womble I'v got the kind for power your after and my engine makes max power of 184.9 @6.7k, no real need to rev pass 7k to get the power your after.
The engine is a 6a, with tsr gas flowed head and gas flowed inlet, tsr mild cams, 4 branch stainless to jetex, k+n filter with drilled box. Unsure on the head as the car was px'ed against a beemer and the guy knew little about it. Dont need much more, but being able to get to 7 before it cuts would be nice, especially on hills, which there are a lot of in devon. Cheers for all the info guys, much appreciated.
Although the engine doesn`t make power past 6500, if you can`t rev it to redline/limit then you`ve got a problem somewhere. Can you rev it to 7200 in neutral? Could be a lead/cap/plug/dizzy breaking down, give the igintion system a good look over.
Bump! Same problem here! Limiter at about 6900-7000 instead of 7200! Dizzy hall new sender/cap/rotors/plugs/leads, engineset up at dynoand makes149PS@6700rpm (limiter) with WUR mod and manifold... I would benefit just from getting the limiter to factory standard... When the limiter kicks in thepower has JUST started to drop...
Just noticed one thing.... My TCI ignition control module isdifferent thanwhat that ETKA states... Part number 811 907 384 instead of 811 907 384 B or 811 977 384 X... Could have something to do with it, I suppose!
