69gt
Boosting 10 psi
Posts: 31
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Post by 69gt on Jan 17, 2013 9:21:43 GMT -5
OK. So got the PIMP in the Pinto. Starts runs as advertised. I have bought the external WG and two piston blowoff valve from Stinger. Started tuning the other day and couldn't seem to keep the boost to the 12 PSI minimum. It jumped to 15 before I let off. I have the vacuum hose routed from the compressor housing to the lower port of the WG. Isn't that supposed to make it stay at minimum? Or have you ever seen the manufacturer put the bigger spring in it? I have never cracked it open. I just want to tune it at the 12 PSI minimum. OK. This one has us confused. There is a weird super kazoo sound up front when the boost gets way up there. Could it be the blowoff valve? We have checked everything else and it seems to be right. Have you ever heard noises like that from the blowoff? PS. When the boost really got up there the Pinto felt like a wild animal  Can't wait to get it all set and tuned! |
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Post by Stinger on Jan 17, 2013 14:00:22 GMT -5
Depending on the setup, the minimum could be as high as 16-17psi. By lower port on the wastegate, you mean the one that is closer to the header, not the one pointing at the passenger side headlight correct?
The BOV shouldn't open unless you let off the throttle so I wouldn't expect the kazoo sound to come from there. Typically that sound would come from a leaking or split intercooler coupler/boost leak, or an exhaust leak between the turbo and manifold/header where the metal gasket is.
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69gt
Boosting 10 psi
Posts: 31
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Post by 69gt on Jan 17, 2013 19:53:24 GMT -5
Depending on the setup, the minimum could be as high as 16-17psi. By lower port on the wastegate, you mean the one that is closer to the header, not the one pointing at the passenger side headlight correct? Yes. Just one vacuum line from compressor to the WG port closest to the manifold. The upper is just open to atmosphere. Is that correct for minimum boost? OK cool. I'll do a recheck of everything. The car does have an old Volvo IC. Maybe it's leaking there. Those intercoolers have those separate end tank things that are clipped/pressed on so maybe a new IC is necessary. My set up is: Fully ported big valve head. Boport 1.5 cam. Ported intakes Front mount Volvo IC Bob's log with external WG. 3" exhaust all the way. |
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69gt
Boosting 10 psi
Posts: 31
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Post by 69gt on Jan 17, 2013 19:59:30 GMT -5
Oh and where can I order a lower minimum boost spring for the WG? I was thinking 8 PSI or so.
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Post by Stinger on Jan 18, 2013 0:41:06 GMT -5
That is the correct way to connect the wg.
The gates use TiAL springs but TiAL has been changing their designs lately so it's best to double check the spring diameter and length before ordering.
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69gt
Boosting 10 psi
Posts: 31
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Post by 69gt on Jan 28, 2013 1:26:57 GMT -5
So I opened the WG up today to see what spring was in there and it was black. Seemed really heavy duty too. Of course couldn't find any reference to a large black spring in their guide. It was the larger 2.36. I think I am just going to order a few lower PSI springs and try em'. Just want to tune it at a safe boost level Took the Pinto out for a tuning drive today all that's left to do for the drivability portion is to get the cold start settings right. It runs like a champ with the PIMP. |
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Post by Stinger on Jan 28, 2013 13:31:07 GMT -5
Good to hear you've got it running well.
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69gt
Boosting 10 psi
Posts: 31
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Post by 69gt on Mar 1, 2013 21:16:50 GMT -5
Heya. So just in case we took the top of the WG apart and pulled the spring. Put it back together and it only made 4.5 PSI. Felt a lot safer but that's below where it's supposed to go. Ever seen em' do that before? Took it apart again and reassembled it. Then the fuel pump regulator went on vacation before I could see if that fixed it. Gonna order some more springs. Those WGs are TiAL F38's right? Do you have a recommended source of the springs? From what I read the flange style have different springs than the V-band style. Either way it's fun learning about this stuff. My goal was a low boost setting of 8-10 PSI and a high of 16-18 since the 91 octane gas is kinda limiting here. Also what do you think of these? www.diyautotune.com/catalog/ebc-electronic-boost-control-solenoid-kit-p-285.html |
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Post by Stinger on Mar 2, 2013 0:38:52 GMT -5
If the psi changed from taking it apart and putting it back together, something was messed up during reassembly (pinched diaphragm, set screws not tight, etc.).
Your best bet on the springs is the measure the diameter and compare to those available. TiAL has changed their design multiple times so it's not as easy as just saying "get this spring".
91 octane should still allow for 18-20psi or so.
If you ask about boost control with the PiMP in the PiMP section, Wes can provide you with info about the best solenoid to use. The ones that come with the Borg Warner EFR turbos are neat because they work well, are cheap, and use the same connector as the factory BCS solenoid (which is the same as an injector connector).
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69gt
Boosting 10 psi
Posts: 31
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Post by 69gt on Mar 5, 2013 20:42:06 GMT -5
Cool. Thanks. I'll take it apart again. We reassembled it again and got the pump going again and it still is 4 or so PSI. Will try again. We did unhook the vac line completely and it boosted fine so the valve's no hanging open or anything. So I'll be really careful this time |
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Can't wait to get it all set and tuned! 
