DJs SS1 - now dad's sprint car

Post by **scimjim** » Sun Feb 12, 2017 8:30 pm

Long time without updates

Spent the whole weekend removing the 3.62 Ford bolted LSD and fitting a 3.92 Quaife with new driveshafts

Then I found a sneak preview of RRs latest induction system

Post by **reliant-reviver** » Sun Feb 12, 2017 9:21 pm

You don't know how right you are. Little one loves her sit in car walker and especially when daddy is making car noises to suit. We got kicked out the kitchen for doing doughnuts earlier and proceeded to J turn down the hall way before drifting into the living room.

Post by **scimjim** » Sun Apr 02, 2017 5:42 pm

A few bits done today but no photos

Traced the starting problem to a poor Earth at the starter - no idea what's changed but the jump lead test confirmed it. Ran a new cable and it's alive

Decided not to fit the lightweight seat as it's not a straightforward swap - job for later.

Post by **scimjim** » Tue Apr 04, 2017 7:13 pm

Well the tyres eventually arrived at 1800 last night.

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Out to the workshop, fitted and back home just after 2100 to watch walking dead on +1

car loaded and we pootled off to Curborough for the pre-season test day this morning.

Weather was kind for a change (we have cancelled due to snow previously!) and I quickly scrubbed the tyres in. Unfortunately it was obvious that I now had a tyre/bodywork interface problem that will need a little rectification.

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(Photos courtesy of CNHSS1)

More importantly, the combination of new tyres and new diff was amazing! Full throttle launch off the line would barely spin the wheels - and Curbs is known for it's poor traction off the line. I found myself pushing faster and faster into corners and had it not been for the recurring fuel issue the times would have been better. After a mojo busting 2016 I came home raring to get G97 out this season

Initially I thought that the fuel problem was the twin carbs again and the faster cornering was making it worse but Craig suggested it was starvation (as opposed to the flooding that you normally get from twin 40s mounted fore/aft). That made a lot of sense as previously the finish line hairpin was the worst corner but now it was the start line long left hander - previously the tank was less than half full and today it was brimmed to the top.

So, list of jobs:

Tweak wings for wheel clearance
Fit new drivers seat
Fit passenger seat
Fit passenger harness
Sort fuel tank vents
MOT
Weigh
Rolling road

Post by **scimjim** » Thu Apr 20, 2017 8:56 am

So, list of jobs:

Tweak wings for wheel clearance
Fit new drivers seat
Fit passenger seat
Fit passenger harness
Sort fuel tank vents
MOT
Weigh
Rolling road - booked for 28th

Post by **nickkeyser** » Thu Apr 20, 2017 9:08 am

Car looks great Jim, and your times from the test day were cracking too.

Can't wait to see what the figures are. You hoping to be out competing this year? Always good to see more CVH cars out.

Post by **scimjim** » Thu Apr 20, 2017 9:30 am

i think we paid £600 for this galv 1400 nearly 10 years ago - as DJs first car!

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It's not been MOT'd since 2010/2011 after the first rebuild, so it was good to see it pass yesterday

Post by **scimjim** » Thu Apr 20, 2017 9:33 am

nickkeyser wrote:Car looks great Jim, and your times from the test day were cracking too.

Can't wait to see what the figures are. You hoping to be out competing this year? Always good to see more CVH cars out.

Hoping to get out this year Nick (been saying that for ages and something always seems to get in the way!) now the car feels competitive I really need to get some track time.

Post by **scimjim** » Fri Apr 28, 2017 9:45 pm

Rolling road went well today - carbs got tweaked to balance them properly and ignition timing moved back to standard (massively out) before doing a run.

Started with a slightly disappointing 95BHP, so some cam swinging and ignition timing tweaking followed. Ended up at 110BHP at 6037rpm which I'm more than happy with, given how well it went on the test day. We actually got the power a little higher but only at silly rpms and at the expense of a few lbft torque, so we wound it back. Most importantly, we had a lovely flat torque curve throughout (can't remember final figure - 100+ though).

Final graph

Post by **CNHSS1** » Fri Apr 28, 2017 9:52 pm

Nice one Jim. The cars got good balance and plenty of grip but was running rough at test day, the dyno setup should see it be a flyer! Watch out RR, Scimjims after ya

Post by **scimjim** » Fri Apr 28, 2017 9:56 pm

Solved the rough running with a vent valve on the tank - ran great all day today and now starts easier and revs faster.

Post by **CNHSS1** » Fri Apr 28, 2017 10:07 pm

Ah glad you sorted it, was spoiling a nice little racer

Post by **scimjim** » Wed May 17, 2017 7:22 pm

Weigh in day - only needed 1.5 turns on the rear right Spring seat (pic below is without me sitting in it but the balance doesn't move much with me in - just the total weight

)

I make that 128.28 BHP/ton which gives me room for improvement later.

Post by **scimjim** » Sat Mar 17, 2018 8:05 pm

So, nearly 12 months on and a different rolling road and set of scales, shows 118 BHP

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And 846Kg

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Which makes 139.5 BHP/ton which is a bit annoying as I was aiming for the 135BHP/ton class in our championship

Post by **reliant-reviver** » Sat Mar 17, 2018 8:10 pm

Shot yourself in the foot there Jim!

What's the engine spec?