Stock cam with 1.4 rockers or mild cam

[dgsaz]

It's a shame Aircooled.net is no longer in business.

I used their L-3 heads, 1.4 ratio rockers, pre cut pushrods that only worked if you were replacing stock rocker arms with 1.4s.

They fit and worked great.

I'm sure the heads made more of a difference than the ratio rockers.
I added a pair of IDF 40's to the stock internals 1776 and the combo is sooooo
much stronger than when it was a single port.

Dub Dyno gives it 89.9 HP based on this combo.
dgsaz

[RickS]

[Scrapefest]

[MuzzcoVW]

[Scrapefest]

Thanks for the replies, it is good to see people are successfully using 1.4 rockers with stock cams , dub Dyno shows they give better low end torque than the other mild cams but as people say it would be the more expensive way to do it, in the UK there is limited choice and a big mark up on performance parts.

I was tempted to try a CB cam but the lead time will mean I won't have time to build the engine before European Bug In in June. So I will have a think whether to use the w100 or wait and keep an eye out for a deal on some 1.4 rockers. 😁

[Erik G]

its also good knowledge for anyone buying one of those out of the box empi motors - they have 1776 and 1914cc long blocks with stock cams

[Brian_e]

Just a heads up......if you are planning to slap 1.4 rockers on a stock cam, you will also need to swap to better valve springs. If you don't, and you try to peel out in the rain, and rev it kinda high, the weak stock springs will launch one or more of your push rods out, and you will need to find a ride.

Brian
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www.type-emotorsports.com

[Scrapefest]

[Scrapefest]

[Brian_e]

[MuzzcoVW]

[Alstrup]

Some 20 years ago we did a good deal of testing regarding bolt on tuning on a stock 1600. Back then it was still possible to find a fresh 1600 to soup up a little.
On our dyno: 300 rpm/sec climb. SAE60 calibration.
A stock 1600 with a Bugpack 1 3/8" header and VW 1,25 rockers (1,23 IRL) 56 hp 115 Nm.
Same engine with Scat 1,4 rockers, 58 hp 112 Nm torque.
Same engine with 34 mm ICT carbs and 1,4 rockers. 74 hp 115 Nm torque. A good deal of rpm power, but not that much usable torque.

Another new 1600 engine. Out of the box 044 Gen 1 heads. 40 x 35 mm valves. 8-1 CR. 1,4 rockers. Dual Spanish 40 mm IDF. 1½" Quiet pack exh. 78 hp 122 Nm torque.

Another 1600 with some miles on it. Honed cylinders, new rings. Optimized deck, 3 angle seat job. 8-1 CR stock carb. 1 3/8" Bugpack exhaust. 59 hp 120 Nm torque.

Another completely rebuilt 1600. All balanced, 565 gr. rods, tight deck, good valve & seat job, touched chambers, 8,2-1 CR. 1,25/1,1 rockers, 27 mm venturi in stock carb. Leistritz stock muffler. 65 hp 120 Nm torque. Nice driver with a little extra hill power.

Another 1600. Stock internals, optimized deck, 3 angle valve & seat job. 8,1 CR, 1,25/1,1 rockers, 009, dual 36 mm Dellorto´s, Sebring muffler. 71 hp 132 Nm torque.

Another 1600. All balanced stock internals. Optimized deck. 545 gr rods. Optimized deck, very detailed stock 113 heads, 8,5 - 1CR. 1,25 rockers, 123 BT dizzy w. HV E core coil, dual 36 mm IDF, CSP Super Comp exhaust. 88 hp 150 Nm torque. It is awesome for what it is.

The L-jet is relatively easy to pull significantly better power out of if the engine can breathe. The first 80 hp is a walk in the park. From there it begins to get a little complicated.
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