water injection

[tcpc]

hi,

what do chaps think off water injection,

it doesn't look that exspensive to fit,
reading up on it some seem to think it does give a bit more power but does help alot to maintain the power you all ready have,

please give your veiws on it

thanks
Tony

[TaSmania]

IMHO - Waste of space and another system to go wrong. Used it on a Turbo'd competition car and it was seriously useful (also as intercooler spray system - ooer)but wouldn't put it on a Wedge V8. Like I say - IMHO
GB

[tcpc]

sorry to have to ask this but what does IMHO mean

[york33]

IMHO = In My Humble Opinion

HTH
Dave

[tcpc]

york33 said: IMHO = In My Humble Opinion

HTH
Dave

thanks Dave

[boosted ls1]

Highly rate it. You can buy a simple load sensing unit for a couple of hundred dollars. Mine's never let me down and it would be helpful on a n/a car especially in mid summer.

[jvaughan]

looked into it a few years back. Came to the conclusion the gains were not that much, not for the money anyway

[tcpc]

i thought it would help with the plenum chamber getting as hot as i does on the set up off the v8s,
after 15 to 20 mins the heat is quite noticable around the plenum so this must reduce your power out put,
on a cold fresh morning it fills like a different car,

[shpub]

tcpc said: i thought it would help with the plenum chamber getting as hot as i does on the set up off the v8s,
after 15 to 20 mins the heat is quite noticable around the plenum so this must reduce your power out put,
on a cold fresh morning it fills like a different car,

The biggest problem is actually where the air intake is. Yes the plenum will get hot due to heat soak when stationary but when moving the cold air does a good job of cooling everything down. The problem is that the air that is sucked in is from the area above the manifolds and is hot. Result is hot air into the plenum and little or no cooling.

The 520 has an ally box around the triple throttle air filterand is fed by 2 80 mm diameter air pipes which get their air from the bottom of the windscreen. I have a big gap between the body and bonnet which is ideal. I have a temp sensor measuring the air temp at the filter. At goodwood, the air temp was getting upto 50-60 degrees waiting in the stratline queue. One the car was moving it dropped dramatically and after about half a lap the temp was down at the 10-12 degree level.

If you want to cool the plenum, get cold air feeding into it.

Steve
www.tvrbooks.co.uk

[tcpc]

thanks for the reply steve,

i don't have a large gap in the same area you have but i could repostion the air flow meter to come straight off the plenum instead of the cuved pipe and box that area in, i have a air vent at the front of that side of the bonet, maybe that might help seperate the hot and cold air a bit

Tony

>> Edited by tcpc on Wednesday 28th May 18:49

[redwedge5]

'but i could repostion the air flow meter to come straight off the plenum instead of the cuved pipe and box that area in,'

This is set up I have in my 450 SEAC. The airfilter is in the top nearside corner of the engine bay. In addition there are two circular grills in the inner wing next to the air filter. I haven't worked out yet where the air flowing through these comes from.
This is the original set up. I think it is like this because the car has an airconditioning pump where the alternator normally fits and the alternator is on the nearside of the engine meaning no room for the usual airfilter position.

[GreenV8S]

'but i could repostion the air flow meter to come straight off the plenum instead of the cuved pipe and box that area in,'

Ditto green V8S (carbon air box at the bottom of the windscreen). Works fine when it's moving but still tends to pull in hot air convecting out the back of the bonnet, when stationary.