Flipping thru the posts I see mention of a "intercooler plus"?
New term to me; this a system or system componenet?
I have the b23ft motor in my turbo wagon? This something special? Unique? faq and archive search didn't show any info.
thx
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steve m

Turbo+ was offered in 2 versions, the first was for the '84-'89 700 Turbo cars, and the later version utilized the improvements of the Jetronic 2.4 system for the '90+ vehicles. The early system can be installed in a later car, but not vice-versa.

Basically, a small seperate add-on computer monitors vacuum/boost pressure, ignition timing, engine RPMs, and the knock sensor. When you are at Wide-Open-Throttle and with the engine above a specific RPM, the Turbo+ unit allows the turbocharger to run a few PSI harder. The computer is a small black box that's bolted to the front of the Air Filter Box and it says NIRA AUTOMOTIVE on the top of it (visible from the top when looking at the air cleaner housing). Below the computer are the vacuum valves that regulate the additional latitude give to the wastegate actuator. It's all packed in there behind the right side headlight.

Turbo+ was an accessory kit available from the Volvo dealerships for the 740 Turbo and the 760 Turbo, and it was factory equipped on all of the 780 Turbos. The dealer cost was around $600 to $700, but many Volvo owners have chosen to retrofit a Saab APC boost controler to their vehicle for a much more cost effective solution that yeilds similar results (and they're more abundant in the salvage yards).

God bless,
Fitz Fitzgerald.
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'87 Blue 240 Wagon, 251k miles.
'88 Black 780, PRV-6, 146k miles.
'89 Black 780 Turbo, 94k miles (accident vehicle I'm restoring).

thank you all for the input, and Fitz for the physical description. I did go to turbo bricks and didn't find info on what it is and how to know if I have it. I see I don't have it so maybe I'll put it on my christmas list for this year!!,,,, I learn from everything I read and all I talk to ....
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steve m

Turbo plus was a kit installed to 89 (and I think 90) 760 and 780 Turbo models.
It supposedly is a new control unit allowing higher boost for a limited duration. Others may be able to verify the exact numbers. I believe it allows for 12 psi boost pressure vs. the stock 10 psi. Equates to about 20 hp, supposedly around 180hp for the Plus cars vs. 160HP for a normal 760T, 740T or 940T.

I assume it included different fuel mapping to richen the mixture to provide this power. I think it also raised the high boost cutout switch (built into all Turbos) to 14 psi instead of 12.

www.turbobricks.org is a great source of info on all things performance related for Turbo Volvos.
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Rob Bareiss, New London CT ::: '87 244DL/M47- 234K, '82 245T/M46-182K, '84 242DL/AW70-100K, '89 244DL/AW70- 212K and I miss my: 86 244DL 215K, 87 244DL 239K, 88 744GLE 233K, 88 244GL 147K, 91 244 183K

Dear Steve

From the little I know about 740's and turbos if you want to get more out of your car without spending much go here and look at the MODS page. It will answer most of your questions.

www.turbobricks.com

Have fun and make sure you pay attention to the engine warnings! Depending on which one you have you may not be able to boost it all that much. My is a K block and I could only expect about 250HP out of it with all mods.

Peter

P.s Turbo plus was a factory addon (over $600) in the higher end 760's and 780's (740's can have it though, but really rare) and ads about 20-25HP when you are really pushing it.

Turbo plus allows a few psi increase in the normal turbo charge air pressure at certain rpms, result, more horsepower. I think it is considered a costly way to get the boost a bit higher. I have it on the 780, factory.