Sevenman's TVR (was SAAB) Blog

May 15, 2013

TVR Back

Filed under: TVR — Administrator @ 10:00 am

The Tamora has had rather a long holiday at Neil Garner’s waiting for:

  • Dampers to be refurbed by Gaz and sent back
  • Correct springs to be sent by Gaz as the initial shipment wasn’t right
  • Setup, and then testing in dry conditions (hard to come by…)

But the car was finished on Monday of this week, so I went down this morning to collect it.

Gaz did the refurb work under warranty, so all I paid for was £40 for the springs.

It was a slightly convoluted route to the garage. A friend on his way to work took me as far as the big Tesco at Cirencester, arriving at 07:30 where I waited and had a large breakfast. At 08:30 I was picked up by Paul and taken on to Neil Garners.

We had a good chat about the car and its setup, which Neil considers to be improved. Neil noted that the rear dampers were set to 4 clicks from soft on one side and 10 from soft on the other. Not settings I had applied, the last time these were adjusted was at Center Gravity.

Neil also noted that, when he took it on a spirited test drive, it was definitely locking a front wheel first. This is good, and I still need to decide about swapping out the adjustable valve.

We also had a good look at the highly-developed LS7-engined Mosler race car he runs and his racing Chimaera.

The setup is now:

  • Front camber -0.75
  • Rear Camber -1.10
  • Front Toe -1.0
  • Rear Toe  -1.5
  • Front dampers 11 clicks from soft
  • Rear dampers 8 clicks from soft
  • Front ride height – At my request 105mm at front splitter centre
  • Some rake applied to match this, exact rake not reported
  • Front springs 400 lb/in
  • Rear springs 375 lb/in

Driving back it felt fine. Subtly different, but nothing I could quantify. Motorway was ok as was A-road. Rear suspension coped with a few undulations that might have caused rubbing before.

May 12, 2013

No Breakfast Club this month

Filed under: TVR — Administrator @ 6:50 am

I had hoped to attend the Shelsley Walsh Breakfast Club as I did last month, although this time with the family.

However, the TVR is still away at Neil Garner. This is in some respects a good thing as the dining room refurb has been dragging on and the garage is full of furniture, so it is useful that the car is away.

There were a couple of delays – Gaz sent the refurbed dampers, but with the wrong springs so those had to go back and wait for replacements.

It was then all fitted and setup by Thursday and Neil wanted to take it for a thorough test drive, but conditions were very wet, so harder to explore the dynamic capabilities. They were off on Friday for a weekend’s racing with their Mosler. Given the choice of collecting the car for the weekend, but without the test drive and having to give-up the garage space, or waiting until early next week, I chose the latter.

Back to decorating…

May 1, 2013

AFR discussions

Filed under: TVR — Administrator @ 8:55 pm

I gave TVR Power a call and had a long chat with Jason about AFR who was very helpful.

He had discussed some of this with me when the run was done, but that was a long day and I must have missed some of it.

Summary seems to be:

  • It is running a bit lean, but not dangerously so
  • On a trackday in very hot weather with a low of WOT it may be more susceptible to problems
  • Normal and enthusiastic driving should be fine
  • A bit richer would give a little more power, but the injectors are running at their limits at WOT
  • There was no knocking on the dyno

Apparently the stock injectors from a 3.6 are fairly cheap disc type and over the years can lose some of their top-end flow. This may be quite common, but not many owners keep finding small things to fix like I do (brake bias, spring rates, AFR…).

As new it should have run at ~ 13.3 which is a favoured value, although they are fine a bit higher than that.

Solutions could be (from cheapest to most expensive)

  1. Remove injectors, clean and flow test. Then refit or use other 2nd hand injectors from stock if they flow better. This will not involve a remap and should only improve things from current.
  2. Fit cleaned / tested 2nd hand Red Rose injectors (£20 each, apparently good for 400 bhp rather than 340ish of stock). This would involve a remap, but might be a 1/2 day using an existing map as a base
  3. Fit the pintle type injectors as used in 4.3 / 4.5 builds (£114 each). Plenty of flow, full-map required.

We decided to try the first option when it is for a service in a couple of months time. Ready-made maps may not exist for a stock 3.6 with upgraded injectors as people seem to combine that with other engine work.

I am a bit less worried about it now, family life is conspiring against me doing a full trackday this year, but there might be a bit of driver training and some track test time for the brake bias changes and the new spring rates / geo that is being done at the moment.

Also had some comments from Neil Garner about this when asking about the suspension (dampers still with Gaz) who said that richer would give a bit more power but 14 / 14.1 isn’t too worrying.

Looking forward to getting the car back with some updated geo and springs, but we are currently using the garage for the dining room contents while some work is done, so it is a good time for the car to be on a Cotswolds holiday.

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