39 replies to this topic

[Krusty]

Apart from buying the supercharger what do I need? Currently at 300 bhp with forged ineternals

[haggi961]

Obd tuner 630cc injectors 3 inch exhaust depending on power Bigger fuel pump

Edited by haggi961, 14 December 2017 - 09:20 PM.

[smiley]

Get water injection, due to excessive  heat.

(Otherwise you are right back at 300 on a hot day)

 

Edited by smiley, 14 December 2017 - 09:22 PM.

[haggi961]

If I was you I would get water injection/meth with obd tuner pro and push the limits of the m62. I reckon 360-380 can be done on the m62 with meth.

[Krusty]

Obd tuner 630cc injectors 3 inch exhaust depending on power Bigger fuel pump

I'm on Dutch 3" exhaust Walbro 455 pump Vxr injectors

[Krusty]

If I was you I would get water injection/meth with obd tuner pro and push the limits of the m62. I reckon 360-380 can be done on the m62 with meth.

That sounds interesting

[Nev]

Wider rear tyres too...

 

[chris_uk]

 

Obd tuner 630cc injectors 3 inch exhaust depending on power Bigger fuel pump

I'm on Dutch 3" exhaust Walbro 455 pump Vxr injectors

 

 

consider a spitfire high power pump 

 

the injectors are siemens deka 630cc, vxr ones wont cut the mustard. 

Edited by chris_uk, 15 December 2017 - 12:49 AM.

[smiley]

The bosh ev14's could be an alternative. They have the same spray pattern as vxr but are bigger. Siemens 630 is single spray.

[Nev]

The bosh ev14's could be an alternative. They have the same spray pattern as vxr but are bigger. Siemens 630 is single spray.

 

I was concerned about spray pattern when I did my conversion, but in the end I don't think it makes any significant difference.

 

[siztenboots]

The bosh ev14's could be an alternative. They have the same spray pattern as vxr but are bigger. Siemens 630 is single spray.

  I was concerned about spray pattern when I did my conversion, but in the end I don't think it makes any significant difference.

ignorance is no excuse fit the bosch ones

[chris_uk]

 

 

The bosh ev14's could be an alternative. They have the same spray pattern as vxr but are bigger. Siemens 630 is single spray.

  I was concerned about spray pattern when I did my conversion, but in the end I don't think it makes any significant difference.

 

ignorance is no excuse fit the bosch ones

 

 

what differences have you seen between the two? i assume to make such a statement you have tested and experimented with both types to make you suggest the bosch is the better injector..

[CHILL Gone DUTCH]

The bosch injector is better spray pattern for a 16valve engine, 

[Rosssco]

Presumably the different engines have different intake port / throat designs and injectors location within the manifold, therefore perhaps the different spray patterns either matter / don't matter dependant on the engine..

[Jetpilot]

Although i never saw an injector duty % i was told by pretty much all on here the vxr injectors were too small for my harrop at 350+ and they would be on the limit and was advised to go bigger. although it did seem a bit of a bun fight about what was the better injector to get, bosch or siemens.

[CHILL Gone DUTCH]

I would say your vxr injectors are probably Already over 90% duty cycle at 300 ish hp

[Nev]

 

 

The bosh ev14's could be an alternative. They have the same spray pattern as vxr but are bigger. Siemens 630 is single spray.

  I was concerned about spray pattern when I did my conversion, but in the end I don't think it makes any significant difference.

 

ignorance is no excuse fit the bosch ones

 

 

Oh, what significant practical/measurable benefit do the Bosch ones have?

 

I've had both the Siemens 630cc and 875cc ones in my engine and never had a mapping/maintenance/power/idle control issue with them (either with the OEM ECU or the Adaptronic ECU).  

Edited by Nev, 15 December 2017 - 06:35 PM.

[mbes2]

Wider rear tyres too...  

What is the max size on a std vx? My new toy is running 305/30@20 rears and still spins them up in the dry

[Nev]

 

Wider rear tyres too...  

What is the max size on a std vx? My new toy is running 305/30@20 rears and still spins them up in the dry

 

 

I'm not sure what the largest tyre/wheel combo you can put under a standard VX to be honest, others might know better, though it will vary depending on camber settings and wheel "poke".

 

305mm rears.

 

Grip is everything, as we both know! Even with 285mm tyres, I've had mine spin up in 3rd gear in the dry or smooth tarmac.

 

I see dozens of people on here spend thousands on high springs rates and this and that "better" damper, yet seem to ignore increasing their wheel/tyre sizes which would be more influential. At the end of the day EVERYTHING you do in the car goes through the rubber, so arguably it's one of the most important thing to concentrate on (if you want to stay on the tarmac).

 

If the OP increases torque of his engine by +100% then it makes sense to increase grip by +100% too... though I know it's hard/a pain to do.

Edited by Nev, 16 December 2017 - 10:27 AM.

[CHILL Gone DUTCH]

I'm hoping to get some 255 on the rear of mine When my new wheels come