Dyno Result for the 700R

[1stRaven]

Good points : 258Bhp at the crank with 280ft/lbs of torque at 1.7bar (23 psi) of boost.

Bad points - Short story : Engine is shot.

Bad Points - Long story :

On the drive down, the car seems to struggling at some points to get up and go. Once we arrived, Iain noticed that it was not idling on all 4 cylinders (James and myself thought that this was due to the 630cc injectors that had recently been installed). Iain did a compression test and leak test on all the cylinders.

Cylinder 1 : 150 Compression, 41% leak
Cylinder 2 : 170 Compression, 30% (I think) leak
Cylinder 3 : 150 Compression, 40 % leak
Cylinder 4 : 190 Compression, No leak test.

So, it seems that the rings are shot and from the tuning runs we did, it was down to the spark map being set too agressively off boost. On boost map was pretty much good.

We did two power runs anyway which gave the 258bhp figure. From what Iain said, with a good bottom end, it would of been over the 300 mark.

On the way home, the car decided to blow its head gasket and then one of the studs holding the turbo on decided to shear off.

Next plan is to pull the engine next weekend and start a full bottom end rebuild with decent internals (John V ;-)) ) balanced to 7k with a decent cam (graph shows that A cam is dead after 5500). Hoping to be back on the road next May.

Engine Specifications:

• 940 B230FK Short Block
• 740 Turbo 531 Head
• T3/T4 Hybrid Turbo
• ATP 3" Turbo wastegate
• Cosworth T-31 Actuator
• MSnS Engine Management System
• 630cc Injectors
• Innovate LC1 Wideband System
• HKS Cone Filter
• Bailey DV36 Dump Valve
• MBC set to 20 Psi
• 3" Custom turboback exhaust
• Iveco Truck Intercooler
• Silcon Hoses
• M90 Gearbox from a 940

[SteveP]

Nice work... and bloody impressive figures! Shame about the block though... although I'm sure all the hard work will pay off eventually

[nejones]

Sorry to hear the bad news Ryan but im sure she'll be back even better next year.
If you can an in depth stage by stage report (with pics) of the rebuild would be nice.

[LankyTim]

Will it top 300BHP with a healthy engine I wonder? Cant wait to find out.

[alsner]

Bummer about the lump but on the positive looking good for the future

Ali

[1stRaven]

Originally Posted by LankyTim

Will it top 300BHP with a healthy engine I wonder? Cant wait to find out.

Originally Posted by 1stRaven

We did two power runs anyway which gave the 258bhp figure. From what Iain said, with a good bottom end, it would of been over the 300 mark.

Plan is for about 400 in May time. The cam will really help with this.

[LankyTim]

400BHP? Careful you dont knock the earth off its axis when pulling away from lights!

[RiPsTa33]

I love breaking engines because i get to make them faster without the wife finding out