Postby Hasbeen » 29 May 2010 02:20
Further to my earlier post, I'll put the mild 2.0L tune into real
world perspective.
I keep my cars in good condition, with everything up to scratch, &
well tuned.
I've has 4 TR7s, with 2 of them bog stock. These 2 were one of each
carb set up, 1 with Zeniths, & 1 with SUs. I found no noticeable
difference in performance between them. My present 7 has over
160,000Km on it, has never had the head off, & has the mild
breathing improvements described earlier.
My local town offeres me the perfect sight to test the tune of my
cars, for no effort. Comming out of town the speed limit goes from
80 to 100Km/H at the very bottom of a long moderate hill. Over this
hill is a 2.5Km long gentle down slope. The hill allows me to test
acceleration & power, & the down slope I use to test brake drag, or
any change in other friction. All well, & they will hold their
speed, in neutral.
With the stock cars, if I hit the hill at 80 both would have to go
back to 4Th to come even near holding that speed. They would loose
a few Km/H. They would accelerate to about 90 if put into third.
With the slightly tuned car, hit the hill at 80 in 5Th, & give it
1/2 throttle, & it will be doing 100Km/H by about half way up the
hill. That is a dramatic performance increase for such a simple
tuning job. As mentioned before, these cars respond much more than
any others I have owned, to small improvements.
If the cars were given a bit of a run up, & hit the hill at 100Km/h,
the tuned car doesn't notice the hill at all. The stock cars if
left in 5Th, would be down to under 80Km/h at the top. If put in
4Th, would still slow to about 95Km/H at the top.
If that townie, with the Fiat X19 is in convoy with me, & I stick it
in 3Rd, & rev the whot not's off it, the stock cars will not drop
any speed, & the honour Triumph will have been upheld, as there is
no way that Fiat can hold it's speed, up that hill.
This, I believe, puts the results of these easy tuning efforts into
a real world perspective.
To add a bit more perspictive, If I floor the 8, anywhere on the
same hill, it will drop back to second, with a chirp of tyres, &
just a little smoke. It will be at drivers licence threatening
speeds, in about 2 seconds, but who needs a car like that, [except
me, that is].
Hasbeen
