When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
That's a shame; I considered a similar system a while back, but was quoted around £2,200, which didn't seem especially good value, although the company's work quality looked good.
I have seen some of your other mods mentioned elsewhere on here; what do you think were the most worthwhile, and were there any downsides to them?
That's a shame; I considered a similar system a while back, but was quoted around £2,200, which didn't seem especially good value, although the company's work quality looked good.
I have seen some of your other mods mentioned elsewhere on here; what do you think were the most worthwhile, and were there any downsides to them?
Pretty much all the mods done were worthwhile and work well together. I did also change the IC pump for a AMG one, I need to work on the S/C coolant circuit to get the benefit.
The Caldoofy intake is a great mod to have, just for the engine bay bling & extra S/C whine. The 200 cell cats were worthwhile at the same time as the exhaust, though it needs to be hot to get through MOT emisions. No other real downsides, the car can easily average mid 30s MPG on a run and must be running at least around the 450bhp mark now.
I can now offer a very good quality cat back exhaust to fit the x350/8 XJR for £1200 delivered to the UK or fitted for free if you come up to Newcastle upon Tyne.
The system is 2.5 inch and has an X pipe in place of the front silencers then on to two small silencers that sit just before the rear diff, then on to two larger rear boxes finished with 4 inch slash cut tail pipes that are on slip joints to allow perfect alignment with the rear bumper.
The exhaust offers a nice time with no drone when cruising. I now also have four branched manifolds fitted to my car and am awaiting getting a slot on the Dyno for after results!
Meth injection is waste if you cant tune for it...Adds 0 HP...
I recant this statement Jackra. Drive an "R" in the summer as opposed to winter temps here up north and the performance is greatly enhanced with the dry cold air. I am thinking that the meth will keep the intake charge much lower giving you that same winter power level in the heat of the summer or at least close...Folks that live in warm climates year round don't know how much stronger an R pulls on a dry 20 degree day!
I recant this statement Jackra. Drive an "R" in the summer as opposed to winter temps here up north and the performance is greatly enhanced with the dry cold air. I am thinking that the meth will keep the intake charge much lower giving you that same winter power level in the heat of the summer or at least close...Folks that live in warm climates year round don't know how much stronger an R pulls on a dry 20 degree day!
Thats what someone else stated.
I also think it helps keep the SC chargers and elbow below the TB clean. As I stated before my charge coolers and elbow were very "gunged up" with soft carbon and my charge coolers were probably less than 20% efficient because of that.
Thats why I say for anyone wanting a performance improvement they need to clean out all that crap after about 60-80k miles or they waste money on other improvements.
I went for a drive today the first time since new rear tires a couple of weeks ago. I replaced my Summer tires with all season. I get wheel spin when I am doing 30 mph and I do not have to floor it at all. With an LSD thats both wheels.
Ground was pretty cold and the traction rating on my new tires is not as good as the old Summer tires which would have been lousy anyway on the cold surface.
I am taking the car in for emissions tomorrow so wanted to make sure all was ok.
I can now offer a very good quality cat back exhaust to fit the x350/8 XJR for £1200 delivered to the UK or fitted for free if you come up to Newcastle upon Tyne.
The system is 2.5 inch and has an X pipe in place of the front silencers then on to two small silencers that sit just before the rear diff, then on to two larger rear boxes finished with 4 inch slash cut tail pipes that are on slip joints to allow perfect alignment with the rear bumper.
The exhaust offers a nice time with no drone when cruising. I now also have four branched manifolds fitted to my car and am awaiting getting a slot on the Dyno for after results!
That does look good, especially coupled with the new manifolds. Before and after dynamometer results would be interesting. I could be tempted. I also like the look of your intake pipe, the standard one appears to be designed with sound attenuation rather than flow in mind.
That does look good, especially coupled with the new manifolds. Before and after dynamometer results would be interesting. I could be tempted. I also like the look of your intake pipe, the standard one appears to be designed with sound attenuation rather than flow in mind.
The standard intake is very much all about reducing noise, and contains a few design issues that reduce or interfere with flow, corrogated section, indentation by the expansion tank etc, the tube obviously removes these.
Before dyno result on my car with my intake, wot flap removed, exhaust, Cambo remap, 6% pulley and 200 cell sport cats was 352 at the wheels (lower by 10whp than the last dyno at a different place) however I will be going back to the same rolling road this week to get the after run for the manifold for as fair a comparison as possible).
Last edited by caldoofy; Jan 28, 2019 at 08:06 PM.
The standard intake is very much all about reducing noise, and contains a few design issues that reduce or interfere with flow, corrogated section, indentation by the expansion tank etc, the tube obviously removes these.
Before dyno result on my car with my intake, wot flap removed, exhaust, Cambo remap, 6% pulley and 200 cell sport cats was 352 at the wheels (lower by 10whp than the last dyno at a different place) however I will be going back to the same rolling road this week to get the after run for the manifold for as fair a comparison as possible).
Forgot to close this off, the after gain was 30whp and a healthy increase in torque further up the rev range. Only thing changed was addition of manifolds.
Downside is that it is now running lean at the top end on the open loop wot preset map so needs a bespoke map to get the best out of it.
Sure does. I had bought an adapter fitting for the schrader valve for the drivers' side fuel rail, but they ended up using the passenger side rail. I'll see if i can get a better picture of the actual connection at the fuel rail.
Well my quest for 450 horsepower is over I just ordered is Zex Nitrous kit has lots of great built-in safeguards so you will not damage your engine Amazon has the system on sale for $410 plus tax free shipping one day... I will post pics once I install it. If it works well I'm going to add a bottle gauge automatic bottle warmer, remote opener, and a Nitrous Express EZ maximizer. This is basically going to be used for 60 roll acceleration
