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The BIGGEST 1641cc Ever...
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Quokka42
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PostPosted: Fri Mar 28, 2014 3:36 am    Post subject: Reply with quote

And when you go back to the track, skip the water and the burnout - they don't help with street tyres, in fact can make things worse.
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Weezle
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PostPosted: Fri Mar 28, 2014 6:44 am    Post subject: dyno curve Reply with quote

nice build for sure. I have a sort of generic question, but since you posted the HP/torque curve how do you use that chart to determine the optimum shift points for this car for best acceleration? Peak torque is pretty early. Would you just ride that high flat torque curve and shift just before it drops off? I want to set my shift light to correspond with dyno testing (when I get that done Smile
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mhisel
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PostPosted: Fri Mar 28, 2014 3:46 pm    Post subject: Reply with quote

You will feel the car stop accelerating hard and just be making noise. In my circumstance, I shfted at 5000rpm. On the dyno sheet my HP started declining at 5000rpm. But drive the car and see what is best. I could had have had better track times if I shifted sooner
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mhisel
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PostPosted: Tue Apr 29, 2014 2:40 pm    Post subject: Reply with quote

I miss the my 1641... Sad
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AlteWagen
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PostPosted: Tue Apr 29, 2014 3:01 pm    Post subject: Reply with quote

Its better that it happened to the 1641 and not the 2332
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mhisel
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PostPosted: Fri Sep 05, 2014 11:45 am    Post subject: Reply with quote

I am embarking on this fantastic journey again. I am going to aim for 8.5:1 try to squeeze out a couple more ponies.
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AlteWagen
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PostPosted: Fri Sep 05, 2014 12:05 pm    Post subject: Reply with quote

Get any track time on the 2332 yet?
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mhisel
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PostPosted: Fri Sep 05, 2014 7:48 pm    Post subject: Reply with quote

Not yet. Still working on my manifolds. I want to drive the car so the small yet vibrant and kick ass displacement engine goes back into the car. This time a 1679cc
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mightymouse
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PostPosted: Sat Sep 06, 2014 10:48 am    Post subject: Reply with quote

well at least learning the lesson the hard way didnt cost you too too much. Everyone on samba who recommends single springs should read this post.

Single springs are for stock cams.

Unless you run some super wild single, you are best off just doing duals on any engine with a performance cam or that is intended to be driven in a spirited fashion.

Biggest problem over the time that performance engines/cars have existed is that people run not enough valve spring.

Even manufacturers often dont put enough spring in and then the aftermarket folks (like myself) see the massive damage it causes and we up the spring pressure and cure all the issues the car had in the past.

Run inner and outer springs and put a rev limiter on it that matches your cams power band.

Done deal. Safe and reliable. Smile


.
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mhisel
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PostPosted: Fri Sep 12, 2014 10:22 pm    Post subject: Reply with quote

I have been very fortunate to be surrounded by such amazing friends. The insight and the dialogue that we have had in regards to this build had been impeccable. The 1641cc has become a 1679cc. The wealth of knowledge and bouncing ideas off each other, is what friends strive to attain. Here is an image of the pre-port work.

Image may have been reduced in size. Click image to view fullscreen.
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mhisel
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PostPosted: Sun Sep 14, 2014 11:04 am    Post subject: Reply with quote

Well... the intake ports came out a little larger than planned. Regardless, they are looking good. Yesterday I put in about 5 hours and another hour this morning bringing the total time to 13 hours. I will post some pictures at a later time. Almost finished
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mhisel
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PostPosted: Sun Oct 05, 2014 7:54 am    Post subject: Reply with quote

In this picture you will notice the chambers have not been touched, but look down the intake valve (left) i am almost finished with the intake port. Looking down the exhaust valve i cut away to help smooth out the bend

Image may have been reduced in size. Click image to view fullscreen.


I started unshrouding the intake valve (bottom intake).

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this is before and after picture of the exhaust port.

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mhisel
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PostPosted: Tue Oct 07, 2014 8:56 pm    Post subject: Reply with quote

Not finished.

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Brian
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PostPosted: Tue Oct 07, 2014 9:28 pm    Post subject: Reply with quote

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manoa
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PostPosted: Tue Oct 07, 2014 11:35 pm    Post subject: Reply with quote

Brian wrote:
Image may have been reduced in size. Click image to view fullscreen.

Y?
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fastfil
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PostPosted: Wed Oct 08, 2014 12:05 am    Post subject: Reply with quote

Brian wrote:
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lol. For those who don't get the reference, this man just had a small accident in his pants.
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mhisel
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PostPosted: Sat Oct 11, 2014 12:32 pm    Post subject: Reply with quote

The other night I put about three hours into the chambers. Almost ready to have the valve guides put in.
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mhisel
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PostPosted: Sun Oct 19, 2014 12:44 am    Post subject: Reply with quote

Not sure if I shared this with you, but I updated the cam. I will be running a Norris 355S. I may have finished the chambers. I am shooting for 100hp, but will probably end up with 80hp. since it is a daily driver, compression will be around 9.5:1.
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mhisel
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PostPosted: Tue Nov 11, 2014 11:30 am    Post subject: Reply with quote

I finally finished the heads. The intake ports look good/okay, port shape looks good/okay and the exhaust ports came out bitchin. I am going work on the manifolds today. I will be surprised if motor gets out of its own way. But enough writing about, now it's time to do it.
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mhisel
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PostPosted: Tue Nov 11, 2014 9:28 pm    Post subject: Reply with quote

I had a chance to port my manifolds, disassembled my carbs to clean and rejet them. It was a very productive day. Now my heads are going to be sent out to get a valve job
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