Going from a single turbo to twins
11-25-2015, 05:31 AM
#101
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Location: Upstate NY
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Engine: TPI 327 SBC Turbo MS2
Transmission: 200-4R CKP Stage 2
Axle/Gears: 3.73
Re: Going from a single turbo to twins
Nice build, looks like fun and a challenge - good luck.
Regarding the catch cans. We're running a single AllStar Perf., that is about identical to the Moroso's you bought, and a check valved PCV. The catch can is piped to a JY electric emissions pump that I reversed the direction of. It turns on when in boost and runs for 5 seconds after out of boost. We ran it all summer for more than 5000 miles with no issues, no oil in the intake and no engine oil leaks. I'm triggering the pump via an MS2, but the same exact thing could be accomplishished with a simple/low budget Hobbs switch and relay. We haven't drained a pint of oil out of it total after a full season of driving. Most of the summer was at 10 psi and we turned it up to 14 psi for the last part of the season.
My two cents, throw them out if needed - lol. Good luck - Jim
Regarding the catch cans. We're running a single AllStar Perf., that is about identical to the Moroso's you bought, and a check valved PCV. The catch can is piped to a JY electric emissions pump that I reversed the direction of. It turns on when in boost and runs for 5 seconds after out of boost. We ran it all summer for more than 5000 miles with no issues, no oil in the intake and no engine oil leaks. I'm triggering the pump via an MS2, but the same exact thing could be accomplishished with a simple/low budget Hobbs switch and relay. We haven't drained a pint of oil out of it total after a full season of driving. Most of the summer was at 10 psi and we turned it up to 14 psi for the last part of the season.
My two cents, throw them out if needed - lol. Good luck - Jim
11-25-2015, 07:58 AM
#103
Re: Going from a single turbo to twins
Nice build, looks like fun and a challenge - good luck.
Regarding the catch cans. We're running a single AllStar Perf., that is about identical to the Moroso's you bought, and a check valved PCV. The catch can is piped to a JY electric emissions pump that I reversed the direction of. It turns on when in boost and runs for 5 seconds after out of boost. We ran it all summer for more than 5000 miles with no issues, no oil in the intake and no engine oil leaks. I'm triggering the pump via an MS2, but the same exact thing could be accomplishished with a simple/low budget Hobbs switch and relay. We haven't drained a pint of oil out of it total after a full season of driving. Most of the summer was at 10 psi and we turned it up to 14 psi for the last part of the season.
My two cents, throw them out if needed - lol. Good luck - Jim
Regarding the catch cans. We're running a single AllStar Perf., that is about identical to the Moroso's you bought, and a check valved PCV. The catch can is piped to a JY electric emissions pump that I reversed the direction of. It turns on when in boost and runs for 5 seconds after out of boost. We ran it all summer for more than 5000 miles with no issues, no oil in the intake and no engine oil leaks. I'm triggering the pump via an MS2, but the same exact thing could be accomplishished with a simple/low budget Hobbs switch and relay. We haven't drained a pint of oil out of it total after a full season of driving. Most of the summer was at 10 psi and we turned it up to 14 psi for the last part of the season.
My two cents, throw them out if needed - lol. Good luck - Jim
11-29-2015, 09:20 PM
#108
Re: Going from a single turbo to twins
Going to be going the fender exhaust route after looking at every possible thing today. Going to be coming out at the lower chin spoiler on the sides of the fender. I have no other choice and since the car isn't my daily driver I'm content with that.
11-29-2015, 10:28 PM
#110
Re: Going from a single turbo to twins
I think the hose will be ok. You might want to look for a silicone version of the one you have. Only because it will last a lot longer when exposed to heat. OEM rubber is only good till like 300* or something… silicone is good for like 450+*
11-30-2015, 11:27 PM
#115
Re: Going from a single turbo to twins
Idk your hose application. But look up the make/model and see what's out there for silicone hose applications. I think you would be fine if you coat or wrap the bend.
Those bump pipes look real lose to the rad. I would wait for the fans before going any further remember the fans at the motor are like 4.5" deep so around the fan blade supports is probably like 3.5" from the rad surface if you mount it that close.
Those bump pipes look real lose to the rad. I would wait for the fans before going any further remember the fans at the motor are like 4.5" deep so around the fan blade supports is probably like 3.5" from the rad surface if you mount it that close.
12-01-2015, 07:04 AM
#116
Re: Going from a single turbo to twins
Idk your hose application. But look up the make/model and see what's out there for silicone hose applications. I think you would be fine if you coat or wrap the bend.
Those bump pipes look real lose to the rad. I would wait for the fans before going any further remember the fans at the motor are like 4.5" deep so around the fan blade supports is probably like 3.5" from the rad surface if you mount it that close.
Those bump pipes look real lose to the rad. I would wait for the fans before going any further remember the fans at the motor are like 4.5" deep so around the fan blade supports is probably like 3.5" from the rad surface if you mount it that close.
12-02-2015, 04:13 PM
#119
Re: Going from a single turbo to twins
have you considered running the DPs like this?
you will have to dodge the fans obviously and I just show a straight shot, but if you merge the two 3" pipes into a 5 (or 4), then reduce down to 4" when you have to duck under the heater box and header it should fit no problem.
you will have to dodge the fans obviously and I just show a straight shot, but if you merge the two 3" pipes into a 5 (or 4), then reduce down to 4" when you have to duck under the heater box and header it should fit no problem.
12-02-2015, 09:40 PM
#121
Re: Going from a single turbo to twins
Are your headers in the way of the 4"?
I was under th impression that the only tight spot with a 4" dp is by the a/c box and you just run the heater box
This is a 3" pipe going under a modified a/c box, surely a 4" could squeeze in there?
I was under th impression that the only tight spot with a 4" dp is by the a/c box and you just run the heater box
This is a 3" pipe going under a modified a/c box, surely a 4" could squeeze in there?
12-02-2015, 10:42 PM
#122
Re: Going from a single turbo to twins
Where you able to test the fans and see how much air they pull? They look pretty decent.
Fender exhaust exits would be interesting lol… but loud even with the turbos. Not to mention any cop could give you a ticket for not running exhaust to the rear bumper. They got me for that, as well as being too "loud" by issuing a noise complaint at a check point. That happened a few times lol. I would get sick of the sound bouncing off everything and kicking right into your ears/face. I had turndowns before the axle and the sound kicking back off dividers would get old real quick lol and those turndowns were behind me. I think the turbos do a good job of killing the noise but its still not going to be fun with them in the fenders.
No way to do a dual 3" into a 4" and run it back? I run one now for my 4" catback and the flow difference isn't really noticeable, its very close in CFM but the 4" wins in the "less surface friction" so its basically even. The only issue with the 4" flowmaster merge is the length. But it can be shortened a lot.
Fender exhaust exits would be interesting lol… but loud even with the turbos. Not to mention any cop could give you a ticket for not running exhaust to the rear bumper. They got me for that, as well as being too "loud" by issuing a noise complaint at a check point. That happened a few times lol. I would get sick of the sound bouncing off everything and kicking right into your ears/face. I had turndowns before the axle and the sound kicking back off dividers would get old real quick lol and those turndowns were behind me. I think the turbos do a good job of killing the noise but its still not going to be fun with them in the fenders.
No way to do a dual 3" into a 4" and run it back? I run one now for my 4" catback and the flow difference isn't really noticeable, its very close in CFM but the 4" wins in the "less surface friction" so its basically even. The only issue with the 4" flowmaster merge is the length. But it can be shortened a lot.
12-02-2015, 11:42 PM
#123
Re: Going from a single turbo to twins
Unfortunately I do not have room along the sub frame near the header to run that size of a pipe. I might be able to get away with 3.5 " but that's pushing it too. I still want to access my spark plugs if need be as well as replace a blown out header gasket easily if I have to. My heater box is modified as well but I would rather the extra room.
12-02-2015, 11:48 PM
#124
Re: Going from a single turbo to twins
Where you able to test the fans and see how much air they pull? They look pretty decent.
Fender exhaust exits would be interesting lol… but loud even with the turbos. Not to mention any cop could give you a ticket for not running exhaust to the rear bumper. They got me for that, as well as being too "loud" by issuing a noise complaint at a check point. That happened a few times lol. I would get sick of the sound bouncing off everything and kicking right into your ears/face. I had turndowns before the axle and the sound kicking back off dividers would get old real quick lol and those turndowns were behind me. I think the turbos do a good job of killing the noise but its still not going to be fun with them in the fenders.
No way to do a dual 3" into a 4" and run it back? I run one now for my 4" catback and the flow difference isn't really noticeable, its very close in CFM but the 4" wins in the "less surface friction" so its basically even. The only issue with the 4" flowmaster merge is the length. But it can be shortened a lot.
Fender exhaust exits would be interesting lol… but loud even with the turbos. Not to mention any cop could give you a ticket for not running exhaust to the rear bumper. They got me for that, as well as being too "loud" by issuing a noise complaint at a check point. That happened a few times lol. I would get sick of the sound bouncing off everything and kicking right into your ears/face. I had turndowns before the axle and the sound kicking back off dividers would get old real quick lol and those turndowns were behind me. I think the turbos do a good job of killing the noise but its still not going to be fun with them in the fenders.
No way to do a dual 3" into a 4" and run it back? I run one now for my 4" catback and the flow difference isn't really noticeable, its very close in CFM but the 4" wins in the "less surface friction" so its basically even. The only issue with the 4" flowmaster merge is the length. But it can be shortened a lot.
As for the fender exits and the police as much as I drive my car I'm not worried too much about it. I have a few good "friends" so if something does happen I am all set.
No room to run dual 3" to a 4" merge either. I would've been better off doing a 2.5" dual to a 4" merge but I did not feel like sending back the 3" tubing kit that I bought from www.mandrelbends.com with an extra 10% off.
So I just sucked it up and decided to deal with using the 3" tubing as well as purchasing two Vibrant resonators to help cut down the sound. I don't think it will be too loud anyways especially with the .68 exh ar on the turbos.
12-03-2015, 09:51 AM
#131
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Car: '88 Formula, '94 Corvette, '95 Bird
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Transmission: T5, Zf6, 4L60E
Axle/Gears: 3.42, Dana44 3.45, 3.23
Re: Going from a single turbo to twins
Depends on the state. I work in Mass and it's pretty strict. I can cite you for using an autozone replacement muffler if it's louder than stock.
In New Hampshire where I live, you can run side pipes that exit before the rear axle, as long as heat shields are in place. You still need a proper muffler, but the state understands the difference between a high HP muscle car, and an idiot who cut his exhaust off to be cool.
-- Joe
12-06-2015, 05:31 PM
#133
Re: Going from a single turbo to twins
Not much progress this week . Have too much going on so I've been busy. I did manage to get the waste gates in place where I want them. I put them up front so I can remove the down pipes if necessary.
12-06-2015, 07:59 PM
#134
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Engine: TPI 327 SBC Turbo MS2
Transmission: 200-4R CKP Stage 2
Axle/Gears: 3.73
Re: Going from a single turbo to twins
Depends on the state. I work in Mass and it's pretty strict. I can cite you for using an autozone replacement muffler if it's louder than stock.
In New Hampshire where I live, you can run side pipes that exit before the rear axle, as long as heat shields are in place. You still need a proper muffler, but the state understands the difference between a high HP muscle car, and an idiot who cut his exhaust off to be cool.
-- Joe
In New Hampshire where I live, you can run side pipes that exit before the rear axle, as long as heat shields are in place. You still need a proper muffler, but the state understands the difference between a high HP muscle car, and an idiot who cut his exhaust off to be cool.
-- Joe
12-06-2015, 08:01 PM
#135
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Engine: TPI 327 SBC Turbo MS2
Transmission: 200-4R CKP Stage 2
Axle/Gears: 3.73
Re: Going from a single turbo to twins
Unfortunately I do not have room along the sub frame near the header to run that size of a pipe. I might be able to get away with 3.5 " but that's pushing it too. I still want to access my spark plugs if need be as well as replace a blown out header gasket easily if I have to. My heater box is modified as well but I would rather the extra room.
12-06-2015, 10:32 PM
#136
Re: Going from a single turbo to twins
Yeah I have thought about it but it would still be a pita. If I think it's too loud then I will do something about bringing the exhaust back to the rear of the car. Time will tell with this one anyways. i could always do two 2.5" down pipes and merge it into the 4". I'll know more come spring time when I can actually drive the car.
12-07-2015, 06:42 AM
#137
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Car: '88 Formula, '94 Corvette, '95 Bird
Engine: LC9, 355" LT1, LT1
Transmission: T5, Zf6, 4L60E
Axle/Gears: 3.42, Dana44 3.45, 3.23
Re: Going from a single turbo to twins
I get it if you have a 500+ hp car, and a reasonable exhaust tone.
But if you have a 150hp crap box and it's pushing 150 decibels you should be executed
-- Joe
12-07-2015, 08:08 PM
#141
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Car: 1987 Z28
Engine: 2005 5.3L, LS6 Cam
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Axle/Gears: DTS 9" 3.50 TrueTrac
Re: Going from a single turbo to twins
Coming along great! I wouldnt worry much about the upper rad hose. just double or triple wrap that section. I have seen turbine hosings closer to a rad that that.
Jay
Jay
12-07-2015, 10:29 PM
#142
Re: Going from a single turbo to twins
The next part will be a pita as well....running the cold side.
12-08-2015, 11:30 PM
#144
Re: Going from a single turbo to twins
Loaded up the welder with a roll of new wire. Hot side is now finished. Now to take everything off and send it out to be coated. Then work on the cold side. With I could run 14 psi with no intercooler or meth.
12-09-2015, 07:09 AM
#146
Re: Going from a single turbo to twins
Lol I was waiting for someone to comment about that.. Yeah its old card board that has been soaked in water before it went under the car. no chance of it going up in flames even though I only tacked in the pieces and took them off and up to the front of the garage to weld them together.
12-11-2015, 07:27 AM
#150
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Car: '88 Formula, '94 Corvette, '95 Bird
Engine: LC9, 355" LT1, LT1
Transmission: T5, Zf6, 4L60E
Axle/Gears: 3.42, Dana44 3.45, 3.23
Re: Going from a single turbo to twins
-- Joe