Rolling Road Result

hiscot · Post by **hiscot** » Sat Dec 16, 2006 10:25 am

Spec is
sp ported head ( std valves )
kent 1811 regrind cams
titian veniers
titian ptp t bods
home made type air box
cheap cone filter
dta s60 ecu
lc1 wide band set to auto adjust the fuel
decat
komotec silencer

mapped by Henry Roy at GMC Newton Stewart
mapped with 95 ron then retarded to protect from knock ( ring lands )
max rpm 7000 due to h lift cams and hydrollic followers
so is a good road safty map not mapped for max power using advance and high rpm

[img][img]http://img50.imageshack.us/img50/7070/dsc00873wi4.jpg[/img][/img]

Rich H · Post by **Rich H** » Sat Dec 16, 2006 10:30 am

Good stuff. I take it the bottom end/pistons/rods are standard?

hiscot · Post by **hiscot** » Sat Dec 16, 2006 10:34 am

yep std thats why its not running full advance or revs the power is still climbingat 7000 rpm

roadboy · Post by **roadboy** » Sat Dec 16, 2006 8:47 pm

I'm surprised the torque is so low considering its running on TBs but this has been my general experience of Kent 1811s.

What are the cams timed to?

Sounds like a good budget build though.

Dan@JPS

hiscot · Post by **hiscot** » Sat Dec 16, 2006 9:37 pm

Hi Dan the valve timing is a sore point them titan venniers are not the best using a hole and peg setup so when you tighten them up they alter with the play in the peg
Pipers are on my list
what would you expect the torque to be @ the wheels ?
the kent seem to make good power with a good tick over due I think to using lift rather than duration
my home made air tube being 115mm is also a tad too large
best mod I ve done was the grey prt, water temp is now rock steady

roadboy · Post by **roadboy** » Mon Dec 18, 2006 11:20 pm

PRRT is a great mod. Would recommend it to anyone (who still has a K).

I would think, with a well ported head and properly timed cams it should be making over 140lb/ft with standard valve sizes.

What size are the TBs?

I think its wise to limit the revs to 7k. My other worry with the 1811s was the lift, 11.2mm is a lot for standard springs to cope with.

What do you think of the S60? I've heard they're pretty good but haven't had a chance to play with one yet.

Dan@JPS

Victor Meldrew · Post by **Victor Meldrew** » Tue Dec 19, 2006 12:10 am

roadboy wrote:PRRT is a great mod. Would recommend it to anyone (who still has a K).

I would think, with a well ported head and properly timed cams it should be making over 140lb/ft with standard valve sizes.

What size are the TBs?

I think its wise to limit the revs to 7k. My other worry with the 1811s was the lift, 11.2mm is a lot for standard springs to cope with.

What do you think of the S60? I've heard they're pretty good but haven't had a chance to play with one yet.

Dan@JPS

Dan.. Scottish Elises price for a PRRT fitted in conjunction with an A service? send me a PM with an estimate.

robin · Post by **robin** » Tue Dec 19, 2006 9:40 am

roadboy wrote:
I would think, with a well ported head and properly timed cams it should be making over 140lb/ft with standard valve sizes.

Dan@JPS

140lbft At the wheels?

I don't have any proper graphs to hand to look at what the typical transmission losses are for an Elise, but I would guess around 10-15% at the top end, so that would mean Hiscot's figures are pretty close to 140lbft.

BTW, I never understand why people use lb/ft - surely it's lbft as in pounds (force, eek) * feet (distance), not pounds per feet? Even the graph has it wrong

Or do I have it wrong?

Cheers,
Robin

tut · Post by **tut** » Tue Dec 19, 2006 10:08 am

I have always used it the other way around, ftlbs, but not sure which is correct, as checking around, I find in one setence on the subject it is used both ways.

"Figure that we can tweak an LT1 engine so that it still makes peak torque of 340 foot pounds at 3600 rpm, but, instead of the curve dropping off to 315 pound feet at 5000"

tut

Rich H · Post by **Rich H** » Tue Dec 19, 2006 10:11 am

Torque is Force X Distance so foot pounds (Sounds better) or pounds feet (lbft) is correct. lb/ft means nothing.

HTH
rich

Rich H · Post by **Rich H** » Tue Dec 19, 2006 10:48 am

Pressure Relief Remote Thermostat

Has a pressure operated bypass allowing high flow in different conditions like high eninge revs even when cold. Costs £65 from landrover with a load of pipework.

Still haven't fitted mine...

hiscot · Post by **hiscot** » Tue Dec 19, 2006 11:25 am

I estimate approx 175/185 flywheel figures and poss over 140 ft t which I think is a brilliant figure I am very happy with the seat off pants feel
The S60 is a brilliant ecu tuned by pot box so very quickly
the target tickover is by advance, and is very good its hard to stall the engine advance comps to keep target tickover
the lc1 works better than I expected allowing the mapper to adjust the advance whilst the lc1 auto tunes the fuel
the air temp sensor is showing a 16% heat soak problem and the lc1 auto adjusts the fuel back to target ( will move air temp to air box ) its set to auto adjust within certain paramerters so if the sensor fails the car will cut out instead off causing the engine to run lean
however the S60 was intended by dta for a honda engine and has far too many outputs than a elise requires
the due out cheaper S40 would suit better ,being a cut down version
The kent 1811 are 10.79 lift not 11.2 and will work with std springs ect however as you can see we have limmited the revs for the hydrolic followers
I have used ptp, t bods hence the heat soak on the air temp sensor being in the bod its self ( new sensor ordered and will be fitted in backplate/airbox)

that prt is well worth fitting just to see how stable the water temp stays at
I also have a very large oil/water cooler
bob