Homer Posted August 1, 2006 Share Posted August 1, 2006 With the hot weather the boost level is dying on my car. It hits 1.25 bar fuel in 4th/5th gear in winter but is now struggling to reach 0.9 bar. AFR's are still rich (mostly aroung 10.5) so it can certainly take a lot more boost despite the heat. So, how can I cheaply and quickly increase the boost of the car before the weekend? Removing the resricitor ring is out the question since it hits 1.3 bar in 2nd! I'm off to Santa Pod at the weekend so would like to increase to 1.2 bar for the event. Link to comment Share on other sites More sharing options...
JamieP Posted August 1, 2006 Share Posted August 1, 2006 bleed valve? Link to comment Share on other sites More sharing options...
Homer Posted August 1, 2006 Author Share Posted August 1, 2006 bleed valve? Was thinking the same thing... Not sure who can ship one before Sat... Also I've got no idea how to set one up. Couldn't find anything on a search since almost everyone says not to use them! Link to comment Share on other sites More sharing options...
JamieP Posted August 1, 2006 Share Posted August 1, 2006 hmmm... i know that speed shack in west drayton high street normally has them in stock. Fitted them a few times to cosworths but i would not be sure where to put it on a twin turbo car:) Link to comment Share on other sites More sharing options...
Homer Posted August 2, 2006 Author Share Posted August 2, 2006 Found some interesting posts from a while back, but none explained how to install the things. This one made me laugh though: http://www.mkivsupra.net/vbb/showpost.php?p=220742&postcount=21 Click the link Link to comment Share on other sites More sharing options...
carl0s Posted August 2, 2006 Share Posted August 2, 2006 Whip off the hose from the wastegate actuator. That'll sure increase boost (too much). Put a bleed valve in line with it though so that some of the air goes where it should and actuates the wastegate, and you'll be sorted. Halfords for the bleed valve. Took a lot of explaining, mostly about RS Turbo boys (and taps) for them to go upstairs and dig one out though. Link to comment Share on other sites More sharing options...
merckx Posted August 2, 2006 Share Posted August 2, 2006 You don't have to open the valve much for an increase in boost, so be careful. I didn't fancy cutting the hose on the car, fuel hose and the those springy clips are ideal for putting on one end of the bleed valve. Link to comment Share on other sites More sharing options...
Mcgoo Posted August 2, 2006 Share Posted August 2, 2006 With the hot weather the boost level is dying on my car. It hits 1.25 bar fuel in 4th/5th gear in winter but is now struggling to reach 0.9 bar. AFR's are still rich (mostly aroung 10.5) so it can certainly take a lot more boost despite the heat. I have the same problem and will be interested to see how you get on...keep us posted... 'Mercx' : Just been looking at your threads from a few months ago. Did you go for a bleed valve or manual boost controller? How have you found it, any problems etc?? Link to comment Share on other sites More sharing options...
mikeyb10supra Posted August 2, 2006 Share Posted August 2, 2006 With the hot weather the boost level is dying on my car. It hits 1.25 bar fuel in 4th/5th gear in winter but is now struggling to reach 0.9 bar. AFR's are still rich (mostly aroung 10.5) so it can certainly take a lot more boost despite the heat. So, how can I cheaply and quickly increase the boost of the car before the weekend? Removing the resricitor ring is out the question since it hits 1.3 bar in 2nd! I'm off to Santa Pod at the weekend so would like to increase to 1.2 bar for the event. Race Fuel are you BPU already? if your intercooler is knackered as well this wont help Link to comment Share on other sites More sharing options...
Pete Posted August 2, 2006 Share Posted August 2, 2006 Water spray Aquamist jobby? I think Martin was doing an offer on these? Easy and quick solutions are not good things in my experience. Link to comment Share on other sites More sharing options...
letmeshowyou Posted August 2, 2006 Share Posted August 2, 2006 Homer, I've got my old one here if you want it? (just sort us out a beer or something next time I see you!) pm me your address matey and I'll try and get it in the post to you! Link to comment Share on other sites More sharing options...
JamieP Posted August 2, 2006 Share Posted August 2, 2006 Found some interesting posts from a while back, but none explained how to install the things. This one made me laugh though: http://www.mkivsupra.net/vbb/showpost.php?p=220742&postcount=21 Click the link haha:D Link to comment Share on other sites More sharing options...
Homer Posted August 2, 2006 Author Share Posted August 2, 2006 Homer, I've got my old one here if you want it? (just sort us out a beer or something next time I see you!) pm me your address matey and I'll try and get it in the post to you! That'll be superb if you could Adi! Are you at pod this Saturday, could pick up from you then? If I can't buy a beer I'll hand over some beer tokens Link to comment Share on other sites More sharing options...
letmeshowyou Posted August 2, 2006 Share Posted August 2, 2006 I am toying with the idea of going on the Friday I think (really can't decide at the mo!) pop us your address and I'll get it on special delivery tomorrow for delivery Friday? Link to comment Share on other sites More sharing options...
wkdtime Posted August 2, 2006 Share Posted August 2, 2006 With the hot weather the boost level is dying on my car. It hits 1.25 bar fuel in 4th/5th gear in winter but is now struggling to reach 0.9 bar. AFR's are still rich (mostly aroung 10.5) so it can certainly take a lot more boost despite the heat. So, how can I cheaply and quickly increase the boost of the car before the weekend? Removing the resricitor ring is out the question since it hits 1.3 bar in 2nd! I'm off to Santa Pod at the weekend so would like to increase to 1.2 bar for the event. Homer whats the state of your I/C, the temps alone shouldnt bring your boost down to 0.9Bar from 1.2Bar, TBH at most with a healthy I/C the drop in boost should be around 0.05-0.1Bar. Im in West London where we see some of the hottest temps and my boost has only dropped by 0.1Bar. Be careful with upping the boost to compensate for the drop in boost if your I/C isnt in good shape for obvious reasons. Link to comment Share on other sites More sharing options...
Homer Posted August 2, 2006 Author Share Posted August 2, 2006 Homer whats the state of your I/C, the temps alone shouldnt bring your boost down to 0.9Bar from 1.2Bar, TBH at most with a healthy I/C the drop in boost should be around 0.05-0.1Bar. IC is mint, its a Greddy 3-row fully ducted from a do-luck front. This is the 3rd summer my car has been BPU and I get the same pressure drop in hot temps every time (Thought its been much better the last 2 due to the FMIC fitment). Link to comment Share on other sites More sharing options...
wkdtime Posted August 2, 2006 Share Posted August 2, 2006 IC is mint, its a Greddy 3-row fully ducted from a do-luck front. This is the 3rd summer my car has been BPU and I get the same pressure drop in hot temps every time (Thought its been much better the last 2 due to the FMIC fitment). Im stumped mate as ive never noticed such a drop, i say Lazy turbos:D Link to comment Share on other sites More sharing options...
imi Posted August 2, 2006 Share Posted August 2, 2006 Homer whats the state of your I/C, the temps alone shouldnt bring your boost down to 0.9Bar from 1.2Bar, TBH at most with a healthy I/C the drop in boost should be around 0.05-0.1Bar. agree with this....i havent noticed any significant drop in boost. Link to comment Share on other sites More sharing options...
Homer Posted August 2, 2006 Author Share Posted August 2, 2006 I am toying with the idea of going on the Friday I think (really can't decide at the mo!) pop us your address and I'll get it on special delivery tomorrow for delivery Friday? Thanks mate, PM on its way Link to comment Share on other sites More sharing options...
Homer Posted August 2, 2006 Author Share Posted August 2, 2006 Im stumped mate as ive never noticed such a drop, i say Lazy turbos:D Maybe we're talking different speeds here? Below 3rd there's no real difference, but the drop off is really noticable in 4th, 5th and 6th (100mph and above). Link to comment Share on other sites More sharing options...
wkdtime Posted August 2, 2006 Share Posted August 2, 2006 I notice the drop in mine in the lower gears 1-3, and in the higher gears its pretty much at the peak just sitting slightly lower, thus due to high load in higher gears the differnce is minimal. Link to comment Share on other sites More sharing options...
Nic Posted August 2, 2006 Share Posted August 2, 2006 Daryll have a read of this thread some good advice from JohnA on the subject. http://mkivsupra.net/vbb/showthread.php?t=66797 Link to comment Share on other sites More sharing options...
Homer Posted August 3, 2006 Author Share Posted August 3, 2006 Daryll have a read of this thread some good advice from JohnA on the subject. http://mkivsupra.net/vbb/showthread.php?t=66797 Thanks Nic, I found that thread just after posting this topic. I'm aiming to use this for drag use only (until all the electronic gizmos go in this winter), so its a for 4k+ rpm use only. Not for road use at all. Link to comment Share on other sites More sharing options...
letmeshowyou Posted August 3, 2006 Share Posted August 3, 2006 This went on special deelivery this afternoon for delivery tomorrow Homer. I'll pm you the tracking number so you can have a squiz on the royal mail site (if like me you enjoy doing such things!) Link to comment Share on other sites More sharing options...
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