Engine upgrades (HDWRENCH)
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Engine upgrades (HDWRENCH)
Here's some info on HDWRENCH's upgrade kit for twin cams, he's done a few of these on bikes on the forum with great results...
I have been gathering as many dyno results from customers as I can here is the latest
98 inch kit 9.7.1
New 37g Cam
My stage I heads
SERT tuner
SE A/C
Stock T/B
The first pulls where very disapointing, the bike ran good to 3500 and then fell like a stone.
45 hp and 91 tq at 2700
Pipes where Big radius , They where removed and swapped for the stock head pipe and SEII slip ons. Then retuned
Now here are peak numbers 91hp and 108 TQ
With 100 even at 2500 and the tq staying above 100 until 4500
Hp was good with a larger t/b the hp numbers could be increased. But this is a street build and very basic at that. But with that kind of tq and such a flat curve why?? This thing is a stump puller.
I have built 95 that could do this but not even close in the money department ( over 1000 more than the 98 inch ket), with a huge cam, (noise also) roller rockers, adjustable pushrods, big valve springs, 800+ in the heads, larger T/B and large a/c set up.
Here's the dyno results with the mods as listed. Talk about bang for your buck. Also these kits are being installed by the every day guy with basic tools for the most part.
98 inch kit 9.7.1 compression
37g andrews cam
stock head pipe SE II slip ons
GMR stage I heads
AND thats it how simple the kit is easy easy almost 100 tq at 2000 and staying above 100 from 2500 to 4700 hard to beat that kind of usable TQ
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