Volvo Turbo 4cyl.

[DAW]

I've been toying with several alternative inline 4/6 engine swap ideas. I'd like to find a donor with an advanced engine mgmt system (stock), RWD, reasonable wt, rear sump, and abundant parts access.

 

If anyone out there has experience with Volvos you may be able to help with this question: can the B234F become a B234FT? Or can a B23FT become a B234FT with the head swap?

 

I'm assuming the use of European market turbo exhaust manifold onto the 4-valve head. I know there's a European B204FT, I drove one in Italy, and in keeping with their practice of staying under 2 liter displacement (tax laws) and fewer emission laws, they really tune their smaller engines. I remember the car being about as strong as my B23FT in the states.

 

So, I know the 4-valve head has a turbo manifold as in Europe, and the 4-valve head was used on the 2.3 liter na engine here on the 740GLE for a year or two..so what kind of performance (with the right pistons) would a larger displacement Volvo turbo 16-valve 4-cyl provide?

 

Anyone know the wt of the Volvo 4cyl?

Has anyone considered the Volvo I-6 B6304F for a swap (10.7:1 cr, 24 valve, 2922cc, 204hp@6000, 197 ft.lbs. @4300, Motronic system, rear sump)?

[Guest mongrel]

Is possible to convert the non turbo to turbo, though it would be much cheeper to go with a turbo engine.

 

What I think you should go for is a b23et out of a 83-84 760, because it comes with:

1. Mahle pistons (good for at least 400hp)

2. Has a much stronger block

3. The 405 head (good for 500hp, ported)

4. Turbo mainfold

5. Good rods (if balanced and shot peened)

6. The 4 valve head is a bolt on (good for 952hp if done right

7. The engine should be a lot cheaper

 

Though, the b23 is cast iron and therefor heavier than the b230. Volvo turbo mainfolds flow porly, to say the least, aftermarket is a must!

 

The only acceptable Volvo gearbox is the m90, though it must be modyfied to accept either b23 or b230.

 

The 5 and 6 cylinder engines does not have the same power potential or the same aftermarket support. But the m90 gearbox bolts up whithout modification.

 

Personaly I would go for the 5 cylinder because it has the most unusual enginelayout, and thats something very possitive to me. The block is good for 500hp, its far from as strong as the b23.

 

The Italian b204et you drove was never sold outside Italy.

 

Have a look at the 952hp carbonfiber Volvo Pv for inspiration at http://www.hunchbackracing.com/

 

I´m not a Volvo fan, I just live in Volvo country /Peter

[DAW]

Thanks Peter! I'm a Sweden fan, I picked my 940Turbo up at the factory in Goetenburg (sp?) and shipped it to the states later on from Bremerhaven. I'm going to look into your suggestions. I've been impressed by the simplicity of the 2.3 and the performance, and it seems to me that the hp ratings are very conservative. My turbo wagon just hauled ***. Actually, for a simple, effective swap into an early Z, I think a B230FT with the stock engine mgmt system would be a great start, then upgrade from there as needed. DAW

[Guest mongrel]

My mistake...

The m90 gearbox fits b23, b230 engines without modification. But you´l need the pressureplate and flyweel from a 94-98 940 and use the cluch from 850R.

I´m not absolutely sure about the info, you should ask someone who´s in to Volvo.

This is a Swedish forum but you can ask in english, these guys know Volvo:

http://www.turboperformanceclub.com/

[Guest jens]

Most volvo tuners use the 91- turbo engine because of a thicker casting with longer rods and the 531 head. never use 740/760 230 engines the rods are weaker. With bigger turbo modified combustion chambers vx3 cam and a mapfueler a 940 devoloped 347 hp. i have seen a 340 hp na 8v volvo. It had a stroked volvo b25 penta crank (i think they used b230 sized big end rods instead of the bigger big end b23)also see 300 hp 2.7 www.kgtrimning.se. Look at http://www.sbr-racing.com/ there is a volvo 16v 2.3 turbo in a 850 kg ford escort. For racing in cui limited class the ford cosworth yb 2 litre engine is the best choice. But i dont think a noisy 4 banger should be fitted in a beatiful car like the z i would go for the 850 t5r engine and make it sound like a audi quattro. t5r engines can be chipped to 330 hp without changing turbo and fuel injectors. It is expensive to buy but the price of the upgrades the 4 banger needs is probably much higher.

[Guest mongrel]

About the 340hp na 8v:

 

the engine sitts in a Amazon sleeper. The block isn´t a production block, volvo only made 40 of these big bore penta blocks, they hadn´t figured out whether with larger bore or longer stroke, the production penta engines got a longer stroke crank (with regular b23 block). The engine is stroked using a penta crank that has been stroked using b230 rods, these rods have a smaller big end than b23 (and penta) rods and are 7mm longer. Pistons are custom Venolia with wery low pin hight. The block needs to be notched when you exeed 2.7 liters, this engine has 3.2!! liters of displacement. The rear end is a Ford 9" with short Strange axles, I don´t remeber what gearbox. The head is a 531 that is ported to flow as much as possible. The car runs low 12s.

 

Penta is Volvos line of marine engines.

 

However, this engine would produce more power with the dohc 4V head, after all 4valvs are always better than 2, it´s a proven fact!

[Guest jens]

The red amazon has been published in wheels and there has always been a article about building a 3 litre and the 3.2 big bore. The one i saw was a 544 built for hillclimp in norway it was almost as fast as a hyundai turbo 4 wd wrc car. It started the danish komo rallysprint. I think kohler racing has made the engine. Mikael trenneman from Trennemotor has made 3 litre engines with a welded crank and chevy rods in the 90s. I have read that the 16v head flows 240 cfm intake and can be fittes to a ford 2.3 turbo engine (crazy idea then the volvo block is better)

Is the penta crank strong enough then offset ground. The stroke most be close to 100 mm instead of 86 (49 mm big end instead of 54 mm makes 12 mm more stroke = 98 mm and i have heard 104 mm with welding. Kg trimning makes only a 90 mm version with chevy rod journals

[Guest jens]

Hmm something went wrong in the first line