Dejon Tool SMIM Dyno

[91-gsx]

I was wondering if anybody had any first hand info on the quality of this part and any differences in power they noticed. Got a good deal on one, wondering if I should pass it up?
Thanks for the help

 

[DSM90AWD]

I can't vouch for the performance of the Dejon SMIM, but the UIP, Intakes I've bought from him were well made. I do have personal experience with SMIM's (I have a similary designed JMF SMIM), and can say that unless you are planning to add cams and larger turbo to enjoy power at higher RPMs, a SMIM is not for you right now.

A stock 1G Manifold is much better matched for what you have now.

 

[dsm-onster]

Personally, if it's a really good deal, I'd buy it but not install it untill you decide to push you r750s and walbro pump. I suppose there's a reason why you purchaed these parts and still run a 14B. If you're waiting for the 14b to blow, the install the smim when you have a big turbo worthy of 750s and a walbro 255. Of course a good set of 210+ duration (at .050" lift) would be great for a SMIM. But I've seen great results by lots w/ stock cams.

Take look at DSMJim's results w/ stock cams: Magnus Manifold. My Results before and after, huge improvement. 12.59 to 12.13. But he DID have a MUCH larger turbo, ran more boost than you should for a 14B. He shaved .46 seconds w/ a fresh boost leak test and stock longblock (stock cams, valves, head ports, stroke, bore).

 

[91-gsx]

Sorry you guys I do not have my setup running yet, so I did not list it. I actually have moved on to a sc6152 t3 with a .63a/r exhaust housing and a 4" SP cover. I'm sure what you guys said should apply now, I just wanted to know if it was well designed to make power. Some say it is not very good while I read about another guy who just changed to a dejontool smim and slicks and took his time from 13.9 in the 1/4 to 11.9... Sure the slicks helped a lot, but not 2 seconds worth of help. I read on the site that they say it has 180 cubic inches in volume, that is close to 3 liters. I think that is a larger volume then most other after market smim's. Should be better for top end.
later

 

[dsm-onster]

A larger voulme plenum devinately helps a boosted setup on the top end. The issues w/ the Dejon unit are not performance oriented from my research of SMIMs. It seams that they have bent flanges at times. But considering the reputation aluminum smims popping at random and for no apparent reason, I think it's a good investment to get a deal on a steel Dejon unit and coax it to fit properly if there are issues. I don't know of anyone bursting a steel weld.

 

[91-gsx]

I think I am going to go ahead and buy it. It does not seem like many on here run that manifold, but if you look at the test they conducted a while back ago between a few of the manifolds on dsmlink. You will notice that the dejon tool, at least to me because I went through all the individual logs, seems to flow more lb/min without any changes, and it also brought on 40lb/min faster then the other ones, thus making more power sooner then the other ones. This is my understanding of the testing, maybe I missed something major. I also ordered a set of BC 272's, so that should go well with the overall setup and smim.
later

Edit: About the volume, most of the other smim are designed to have more volume then 2 liters so that the engine does not outflow them. If you look at the majority of them though, they only have a volume slightly bigger then 2 liters, like 2.5.

 

[dsm-onster]

Edit: About the volume, most of the other smim are designed to have more volume then 2 liters so that the engine does not outflow them. If you look at the majority of them though, they only have a volume slightly bigger then 2 liters, like 2.5.

Correct. a dejon tool smim should still be useful higher in the revrange than others. But the intake runner shape ultimately dictates overal power curve. I saw thaqt thread in the dsmlink forums. It seams that the Dejon smim has a good balance of runer shape and plenum volume. I really havn't seen a large plenum kill power up top. Nor would it be expected to such from my training. But, I HAVE seen an unmatched runner shape lower performance. In my experience a larger plenum doesn't take away from the lower revs. Only adds to the up revs. After that, runner shape completely 'controls' the nature of the manifold w/ a certain setup.